Fixed Windows compiler complaints

http://codereview.appspot.com/6392044



git-svn-id: http://skia.googlecode.com/svn/trunk@4511 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGpuGL_program.cpp b/src/gpu/gl/GrGpuGL_program.cpp
index d506c6c..736be93 100644
--- a/src/gpu/gl/GrGpuGL_program.cpp
+++ b/src/gpu/gl/GrGpuGL_program.cpp
@@ -119,7 +119,7 @@
             // and perform a y-flip.
             GrMatrix m;
             m.setScale(GrIntToScalar(2) / rt->width(), GrIntToScalar(-2) / rt->height());
-            m.postTranslate(-1.f , 1.f);
+            m.postTranslate(-GR_Scalar1, GR_Scalar1);
             m.preConcat(vm);
 
             // GL wants a column-major 4x4.