if (!(r = new(char*, strv_length(a)+strv_length(b)+1)))
return NULL;
- for (k = r; *a; k++, a++)
- if (!(*k = strdup(*a)))
- goto fail;
- for (; *b; k++, b++)
- if (!(*k = strappend(*b, suffix)))
+ k = r;
+ if (a)
+ for (; *a; k++, a++) {
+ *k = strdup(*a);
+ if (!*k)
+ goto fail;
+ }
+
+ for (; *b; k++, b++) {
+ *k = strappend(*b, suffix);
+ if (!*k)
goto fail;
+ }
*k = NULL;
return r;