Suppress some warnings on linux.

R=reed@google.com
Review URL: https://codereview.appspot.com/6572046

git-svn-id: http://skia.googlecode.com/svn/trunk@5687 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/MatrixTest.cpp b/tests/MatrixTest.cpp
index 30542dc..744f765 100644
--- a/tests/MatrixTest.cpp
+++ b/tests/MatrixTest.cpp
@@ -44,8 +44,8 @@
             for (int i = 0; i < 9; ++i) {
                 float aVal = a.get(i);
                 float bVal = b.get(i);
-                int aValI = *reinterpret_cast<int*>(&aVal);
-                int bValI = *reinterpret_cast<int*>(&bVal);
+                int aValI = *SkTCast<int*>(&aVal);
+                int bValI = *SkTCast<int*>(&bVal);
                 if (0 == aVal && 0 == bVal && aValI != bValI) {
                     foundZeroSignDiff = true;
                 } else {
@@ -58,8 +58,8 @@
             for (int i = 0; i < 9; ++i) {
                 float aVal = a.get(i);
                 float bVal = b.get(i);
-                int aValI = *reinterpret_cast<int*>(&aVal);
-                int bValI = *reinterpret_cast<int*>(&bVal);
+                int aValI = *SkTCast<int*>(&aVal);
+                int bValI = *SkTCast<int*>(&bVal);
                 if (sk_float_isnan(aVal) && aValI == bValI) {
                     foundNaN = true;
                 } else {