Assure that `sstrdup' works with NULL-pointers

diff --git a/src/common.c b/src/common.c
index 43a51a5..50a563a 100644 (file)
--- a/src/common.c
+++ b/src/common.c
@@ -56,6 +56,9 @@ char *sstrdup (const char *s)
 {
        char *r;
 
+       if (s == NULL)
+               return (NULL);
+
        if((r = strdup (s)) == NULL)
        {
                DBG ("Not enough memory.");