convert float to SkScalar changes

http://codereview.appspot.com/6071043/

Submitted on behalf of Guanqun.Lu@gmail.com



git-svn-id: http://skia.googlecode.com/svn/trunk@3779 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 38b682a..7ee2b71 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -240,10 +240,10 @@
 }
 
 void scale_rect(SkRect* rect, float xScale, float yScale) {
-    rect->fLeft *= xScale;
-    rect->fTop *= yScale;
-    rect->fRight *= xScale;
-    rect->fBottom *= yScale;
+    rect->fLeft = SkScalarMul(rect->fLeft, SkFloatToScalar(xScale));
+    rect->fTop = SkScalarMul(rect->fTop, SkFloatToScalar(yScale));
+    rect->fRight = SkScalarMul(rect->fRight, SkFloatToScalar(xScale));
+    rect->fBottom = SkScalarMul(rect->fBottom, SkFloatToScalar(yScale));
 }
 
 float adjust_sigma(float sigma, int *scaleFactor, int *halfWidth,