log: allow specifying a NULL callback to disable logging

1 files changed, 4 insertions, 0 deletions

diff --git a/log.c b/log.c
index a940ba6..d56ec28 100644
--- a/log.c
+++ b/log.c
@@ -34,6 +34,10 @@ void mg2di_log_default_callback(MG2DLogger *log, int level,
 void mg2di_log(MG2DLogger *log, int level, const char *fmt, ...)
 {
     va_list vl;
+
+    if (!log->log)
+        return;
+
     va_start(vl, fmt);
     log->log(log, level, fmt, vl);
     va_end(vl);