Bug#424061: Insufficient amount of memory allocated

[Halme, Matti]

I found out that if one of the labels in bar-chart exceed a certain length
(11 bytes), this kind of crash occurs. When looking at the source code of the
Debian distribution, the reason is obvious:

        slen = PyString_Size(pstr);
        if ((slen = 0))
            goto cleanup;
        mem = malloc((size_t)slen+1);

And the change made at Debianization was:

@@ -712,7 +713,7 @@
         if (pstr == NULL)
             goto cleanup;
         slen = PyString_Size(pstr);
-        if (slen == NULL)
+        if ((slen = 0))
             goto cleanup;
         mem = malloc((size_t)slen+1);
         if (mem == NULL){