Fixing Windows compiler complaints

http://codereview.appspot.com/5991056/



git-svn-id: http://skia.googlecode.com/svn/trunk@3626 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/InterpBench.cpp b/bench/InterpBench.cpp
index 69fbd9b..1db832d 100644
--- a/bench/InterpBench.cpp
+++ b/bench/InterpBench.cpp
@@ -18,8 +18,8 @@
 public:
     InterpBench(void* param, const char name[]) : INHERITED(param) {
         fName.printf("interp_%s", name);
-        fFx = 3.3;
-        fDx = 0.1257;
+        fFx = 3.3f;
+        fDx = 0.1257f;
     }
 
     virtual void performTest(int16_t dst[], float x, float dx, int count) = 0;