dupstr() should cope with being passed NULL

[originally from svn r3429]

diff --git a/misc.c b/misc.c
index 3fea3746f8d1121c8455e6c9cca4f8bb6048d15a..78d829a9b4ecfb8cafdbc648e73d12fd499ef9c9 100644 (file)
--- a/misc.c
+++ b/misc.c
@@ -11,9 +11,12 @@
 
 char *dupstr(const char *s)
 {
-    int len = strlen(s);
-    char *p = snewn(len + 1, char);
-    strcpy(p, s);
+    char *p = NULL;
+    if (s) {
+        int len = strlen(s);
+        p = snewn(len + 1, char);
+        strcpy(p, s);
+    }
     return p;
 }