fix double->float warnings



git-svn-id: http://skia.googlecode.com/svn/trunk@8224 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/rects.cpp b/gm/rects.cpp
index e059284..2c972fb 100644
--- a/gm/rects.cpp
+++ b/gm/rects.cpp
@@ -128,28 +128,28 @@
         {
             // 1x1.5 scale
             SkMatrix m;
-            m.setScale(1, 1.5);
+            m.setScale(1, 1.5f);
             fMatrices.push_back(m);
         }
 
         {
             // 1.5x1.5 scale
             SkMatrix m;
-            m.setScale(1.5, 1.5);
+            m.setScale(1.5f, 1.5f);
             fMatrices.push_back(m);
         }
 
         {
             // 1x1.5 skew
             SkMatrix m;
-            m.setSkew(1, 1.5);
+            m.setSkew(1, 1.5f);
             fMatrices.push_back(m);
         }
 
         {
             // 1.5x1.5 skew
             SkMatrix m;
-            m.setSkew(1.5, 1.5);
+            m.setSkew(1.5f, 1.5f);
             fMatrices.push_back(m);
         }