I feel like my clang is especially sensitive to unused variables.

BUG=

Review URL: https://codereview.chromium.org/82913006

git-svn-id: http://skia.googlecode.com/svn/trunk/src@12369 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/core/SkMatrix.cpp b/core/SkMatrix.cpp
index a640519..3caf51a 100644
--- a/core/SkMatrix.cpp
+++ b/core/SkMatrix.cpp
@@ -48,13 +48,16 @@
 
 #ifdef SK_SCALAR_IS_FLOAT
     static const int32_t kScalar1Int = 0x3f800000;
-    static const int32_t kPersp1Int  = 0x3f800000;
 #else
     #define scalarAsInt(x)  (x)
     static const int32_t kScalar1Int = (1 << 16);
     static const int32_t kPersp1Int  = (1 << 30);
 #endif
 
+#ifdef SK_SCALAR_SLOW_COMPARES
+    static const int32_t kPersp1Int  = 0x3f800000;
+#endif
+
 uint8_t SkMatrix::computePerspectiveTypeMask() const {
 #ifdef SK_SCALAR_SLOW_COMPARES
     if (SkScalarAs2sCompliment(fMat[kMPersp0]) |