Enabled MSVC warning 4389 : signed/unsigned mismatch.

I also fixed Config.cpp so it compiles without the warning.

This is because this is now a warning as error in Chromium.
Review URL: https://codereview.appspot.com/5600047

git-svn-id: https://angleproject.googlecode.com/svn/trunk@980 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libEGL/Config.cpp b/src/libEGL/Config.cpp
index e4dc704..89bc8d8 100644
--- a/src/libEGL/Config.cpp
+++ b/src/libEGL/Config.cpp
@@ -321,25 +321,25 @@
               case EGL_RED_SIZE:                  match = config->mRedSize >= attribute[1];                         break;
               case EGL_DEPTH_SIZE:                match = config->mDepthSize >= attribute[1];                       break;
               case EGL_STENCIL_SIZE:              match = config->mStencilSize >= attribute[1];                     break;
-              case EGL_CONFIG_CAVEAT:             match = config->mConfigCaveat == attribute[1];                    break;
+              case EGL_CONFIG_CAVEAT:             match = config->mConfigCaveat == (EGLenum) attribute[1];          break;
               case EGL_CONFIG_ID:                 match = config->mConfigID == attribute[1];                        break;
               case EGL_LEVEL:                     match = config->mLevel >= attribute[1];                           break;
-              case EGL_NATIVE_RENDERABLE:         match = config->mNativeRenderable == attribute[1];                break;
+              case EGL_NATIVE_RENDERABLE:         match = config->mNativeRenderable == (EGLBoolean) attribute[1];   break;
               case EGL_NATIVE_VISUAL_TYPE:        match = config->mNativeVisualType == attribute[1];                break;
               case EGL_SAMPLES:                   match = config->mSamples >= attribute[1];                         break;
               case EGL_SAMPLE_BUFFERS:            match = config->mSampleBuffers >= attribute[1];                   break;
               case EGL_SURFACE_TYPE:              match = (config->mSurfaceType & attribute[1]) == attribute[1];    break;
-              case EGL_TRANSPARENT_TYPE:          match = config->mTransparentType == attribute[1];                 break;
+              case EGL_TRANSPARENT_TYPE:          match = config->mTransparentType == (EGLenum) attribute[1];       break;
               case EGL_TRANSPARENT_BLUE_VALUE:    match = config->mTransparentBlueValue == attribute[1];            break;
               case EGL_TRANSPARENT_GREEN_VALUE:   match = config->mTransparentGreenValue == attribute[1];           break;
               case EGL_TRANSPARENT_RED_VALUE:     match = config->mTransparentRedValue == attribute[1];             break;
-              case EGL_BIND_TO_TEXTURE_RGB:       match = config->mBindToTextureRGB == attribute[1];                break;
-              case EGL_BIND_TO_TEXTURE_RGBA:      match = config->mBindToTextureRGBA == attribute[1];               break;
+              case EGL_BIND_TO_TEXTURE_RGB:       match = config->mBindToTextureRGB == (EGLBoolean) attribute[1];   break;
+              case EGL_BIND_TO_TEXTURE_RGBA:      match = config->mBindToTextureRGBA == (EGLBoolean) attribute[1];  break;
               case EGL_MIN_SWAP_INTERVAL:         match = config->mMinSwapInterval == attribute[1];                 break;
               case EGL_MAX_SWAP_INTERVAL:         match = config->mMaxSwapInterval == attribute[1];                 break;
               case EGL_LUMINANCE_SIZE:            match = config->mLuminanceSize >= attribute[1];                   break;
               case EGL_ALPHA_MASK_SIZE:           match = config->mAlphaMaskSize >= attribute[1];                   break;
-              case EGL_COLOR_BUFFER_TYPE:         match = config->mColorBufferType == attribute[1];                 break;
+              case EGL_COLOR_BUFFER_TYPE:         match = config->mColorBufferType == (EGLenum) attribute[1];       break;
               case EGL_RENDERABLE_TYPE:           match = (config->mRenderableType & attribute[1]) == attribute[1]; break;
               case EGL_MATCH_NATIVE_PIXMAP:       match = false; UNIMPLEMENTED();                                   break;
               case EGL_CONFORMANT:                match = (config->mConformant & attribute[1]) == attribute[1];     break;