Use SkBits2Float in SkRandom

https://codereview.appspot.com/7266044/



git-svn-id: http://skia.googlecode.com/svn/trunk@7648 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/utils/SkRandom.h b/include/utils/SkRandom.h
index 6ab1cd1..3e2ef20 100644
--- a/include/utils/SkRandom.h
+++ b/include/utils/SkRandom.h
@@ -197,7 +197,7 @@
      */
     float nextF() {
         unsigned int floatint = 0x3f800000 | (this->nextU() >> 9);
-        float f = *SkTCast<float*>(&floatint) - 1.0f;
+        float f = SkBits2Float(floatint) - 1.0f;
         return f;
     }