Fixed cross compilation with mingw.

src/ports/SkAtomics_win.h

Index: src/ports/SkAtomics_win.h
diff --git a/src/ports/SkAtomics_win.h b/src/ports/SkAtomics_win.h
index f4d6da4e3e28bdd5ae6c140a0a35962747898d7f..bb9f89b38da7b8a490c8791c293364d4e40f91c6 100644
--- a/src/ports/SkAtomics_win.h
+++ b/src/ports/SkAtomics_win.h
@@ -13,12 +13,14 @@
 #include <intrin.h>
 #include <stdint.h>
 
+#ifdef _MSC_VER

[bungeman-skia, 2014/03/14 14:50:37]

Why are you using this file at all? Why not #define SK_ATOMICS_PLATFORM_H to the
_sync version? If gcc does not support the MSDN stated way of doing this, one
should use gcc's way of doing it if building with gcc.

 //MSDN says in order to declare an interlocked function for use as an
 //intrinsic, include intrin.h and put the function in a #pragma intrinsic
 //directive.
 //The pragma appears to be unnecessary, but doesn't hurt.
 #pragma intrinsic(_InterlockedIncrement, _InterlockedExchangeAdd, _InterlockedDecrement)
 #pragma intrinsic(_InterlockedCompareExchange)
+#endif
 
 static inline int32_t sk_atomic_inc(int32_t* addr) {
     // InterlockedIncrement returns the new value, we want to return the old.