remove sprintf

src/core/SkError.cpp

Index: src/core/SkError.cpp
diff --git a/src/core/SkError.cpp b/src/core/SkError.cpp
index d85b5ff0cc08d47daff2793122a540938f60288d..96bda7ebf473da48202dbce83c26daed07dff957 100644
--- a/src/core/SkError.cpp
+++ b/src/core/SkError.cpp
@@ -116,7 +116,7 @@ void SkErrorInternals::SetError(SkError code, const char *fmt, ...) {
             break;
     }
 
-    sprintf( str, "%s: ", error_name );
+    snprintf( str, ERROR_STRING_LENGTH, "%s: ", error_name );
     int string_left = SkToInt(ERROR_STRING_LENGTH - strlen(str));
     str += strlen(str);