Fixes error handling in BindAttribLocation
TRAC #11661
Signed-off-by: Andrew Lewycky
Signed-off-by: Daniel Koch

Author:    Shannon Woods

git-svn-id: https://angleproject.googlecode.com/svn/trunk@131 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/libGLESv2.cpp b/src/libGLESv2/libGLESv2.cpp
index ea0039d..06b42f3 100644
--- a/src/libGLESv2/libGLESv2.cpp
+++ b/src/libGLESv2/libGLESv2.cpp
@@ -120,7 +120,19 @@
 
             if (!programObject)
             {
-                return error(GL_INVALID_VALUE);
+                if (context->getShader(program))
+                {
+                    return error(GL_INVALID_OPERATION);
+                }
+                else
+                {
+                    return error(GL_INVALID_VALUE);
+                }
+            }
+
+            if (strncmp(name, "gl_", 3) == 0)
+            {
+                return error(GL_INVALID_OPERATION);
             }
 
             programObject->bindAttributeLocation(index, name);