svc_encodeframe.c: change to use correct type

Change-Id: I2e97a1d3935944573d027a8020fe1aa391a6f27a

vpx/src/svc_encodeframe.c

@@ -234,7 +234,8 @@ static void svc_log_reset(SvcContext *svc_ctx) {
   si->message_buffer[0] = '\0';
 }
 
-static int svc_log(SvcContext *svc_ctx, int level, const char *fmt, ...) {
+static int svc_log(SvcContext *svc_ctx, SVC_LOG_LEVEL level,
+                   const char *fmt, ...) {
   char buf[512];
   int retval = 0;
   va_list ap;