Refactor Uniform::[vp]sRegisterIndex to unsigned integers.

TRAC #22858

Signed-off-by: Geoff Lang
Signed-off-by: Nicolas Capens
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2305 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/Renderer9.cpp b/src/libGLESv2/renderer/Renderer9.cpp
index 6df49c6..a61affb 100644
--- a/src/libGLESv2/renderer/Renderer9.cpp
+++ b/src/libGLESv2/renderer/Renderer9.cpp
@@ -1727,12 +1727,12 @@
 
 void Renderer9::applyUniformnfv(gl::Uniform *targetUniform, const GLfloat *v)
 {
-    if (targetUniform->psRegisterIndex >= 0)
+    if (targetUniform->isReferencedByFragmentShader())
     {
         mDevice->SetPixelShaderConstantF(targetUniform->psRegisterIndex, v, targetUniform->registerCount);
     }
 
-    if (targetUniform->vsRegisterIndex >= 0)
+    if (targetUniform->isReferencedByVertexShader())
     {
         mDevice->SetVertexShaderConstantF(targetUniform->vsRegisterIndex, v, targetUniform->registerCount);
     }