getenv can return NULL

	Patch from Steve G

diff --git a/src/lib/missing.c b/src/lib/missing.c
index fa970eb..1415fdb 100644 (file)
--- a/src/lib/missing.c
+++ b/src/lib/missing.c
@@ -91,7 +91,7 @@ int gethostname(char *name, int len)
        char            *h;
 
        h = getenv("HOSTNAME");
-       if (strlen(h) + 1 > len)
+       if (!h || (strlen(h) + 1 > len))
                return -1;
        strcpy(name, h);
        return 0;