Avoid passing NULL to vprintf().refs/pull/1552/head

1 files changed, 7 insertions, 4 deletions

diff --git a/lib/utils_base.c b/lib/utils_base.c
index 3822bcf..19a531f 100644
--- a/lib/utils_base.c
+++ b/lib/utils_base.c
@@ -87,10 +87,13 @@ void _get_monitoring_plugin( monitoring_plugin **pointer ){
 void
 die (int result, const char *fmt, ...)
 {
-        va_list ap;
-        va_start (ap, fmt);
-        vprintf (fmt, ap);
-        va_end (ap);
+        if(fmt!=NULL) {
+                va_list ap;
+                va_start (ap, fmt);
+                vprintf (fmt, ap);
+                va_end (ap);
+        }
+
         if(this_monitoring_plugin!=NULL) {
                 np_cleanup();
         }