fix (some) 64bit warnings -- size_t -> int

include/core/SkTypes.h

Index: include/core/SkTypes.h
diff --git a/include/core/SkTypes.h b/include/core/SkTypes.h
index 4e2f0c159a8594083d73ef32f4eea37560aead7c..7db3b190d75e04b871671a157f0480cf5284f06a 100644
--- a/include/core/SkTypes.h
+++ b/include/core/SkTypes.h
@@ -217,6 +217,7 @@ typedef uint8_t SkBool8;
     SK_API uint16_t    SkToU16(uintmax_t);
     SK_API int32_t     SkToS32(intmax_t);
     SK_API uint32_t    SkToU32(uintmax_t);
+    SK_API int         SkToInt(intmax_t);
 #else
     #define SkToS8(x)   ((int8_t)(x))
     #define SkToU8(x)   ((uint8_t)(x))
@@ -224,6 +225,7 @@ typedef uint8_t SkBool8;
     #define SkToU16(x)  ((uint16_t)(x))
     #define SkToS32(x)  ((int32_t)(x))
     #define SkToU32(x)  ((uint32_t)(x))
+    #define SkToInt(x)  ((int)(x))
 #endif
 
 /** Returns 0 or 1 based on the condition