Fix some warnings

Review URL: http://codereview.appspot.com/5075049/



git-svn-id: http://skia.googlecode.com/svn/trunk@2304 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrAAHairLinePathRenderer.cpp b/gpu/src/GrAAHairLinePathRenderer.cpp
index d57aa3a..8349fa7 100644
--- a/gpu/src/GrAAHairLinePathRenderer.cpp
+++ b/gpu/src/GrAAHairLinePathRenderer.cpp
@@ -219,7 +219,8 @@
         GrAssert(get_float_exp(3000000.f) == 21);
     }
 #endif
-    return (((*(int*)&x) & 0x7f800000) >> 23) - 127;
+    const int* iptr = (const int*)&x;
+    return (((*iptr) & 0x7f800000) >> 23) - 127;
 }
 
 // we subdivide the quads to avoid huge overfill