Fix wrong printflike for FormattedError in Cheevos.

src/frontend-common/cheevos.cpp

@@ -85,7 +85,7 @@ static ALWAYS_INLINE CommonHostInterface* GetHostInterface()
   return static_cast<CommonHostInterface*>(g_host_interface);
 }
 
-static void FormattedError(const char* format, ...) printflike(2, 3);
+static void FormattedError(const char* format, ...) printflike(1, 2);
 static void FormattedError(const char* format, ...)
 {
   std::va_list ap;