fix warnings around size_t/int
fix warnings around undeclared (non-static) functions

TBR=bsalomon@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/242643008

git-svn-id: http://skia.googlecode.com/svn/trunk@14267 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/utils/SkMatrix22.h b/src/utils/SkMatrix22.h
index d0f4ed3..bc567ea 100644
--- a/src/utils/SkMatrix22.h
+++ b/src/utils/SkMatrix22.h
@@ -5,6 +5,9 @@
  * found in the LICENSE file.
  */
 
+#ifndef SkMatrix22_DEFINED
+#define SkMatrix22_DEFINED
+
 #include "SkPoint.h"
 
 class SkMatrix;
@@ -24,3 +27,5 @@
  *  and saves a multiply by not computing r.
  */
 void SkComputeGivensRotation(const SkVector& h, SkMatrix* G);
+
+#endif