fix warnings on Mac in tests

Fix these class of warnings:
- unused functions
- unused locals
- sign mismatch
- missing function prototypes
- missing newline at end of file
- 64 to 32 bit truncation

The changes prefer to link in dead code in the debug build
with 'if (false)' than to comment it out, but trivial cases
are commented out or sometimes deleted if it appears to be
a copy/paste error.
Review URL: https://codereview.appspot.com/6301045

git-svn-id: http://skia.googlecode.com/svn/trunk@4175 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/Matrix44Test.cpp b/tests/Matrix44Test.cpp
index 9846e7d..9e589e6 100644
--- a/tests/Matrix44Test.cpp
+++ b/tests/Matrix44Test.cpp
@@ -76,7 +76,7 @@
     }
 }
 
-void TestMatrix44(skiatest::Reporter* reporter) {
+static void TestMatrix44(skiatest::Reporter* reporter) {
 #ifdef SK_SCALAR_IS_FLOAT
     SkMatrix44 mat, inverse, iden1, iden2, rot;
 
@@ -139,9 +139,9 @@
                         0, 0, 0, 1);
     }
 
-#if 0   // working on making this pass
-    test_common_angles(reporter);
-#endif
+    if (false) { // avoid bit rot, suppress warning (working on making this pass)
+        test_common_angles(reporter);
+    }
 #endif
 }