misc: Fixed a memory leak.

src/misc.c

@@ -532,7 +532,7 @@ int ssh_mkdir(const char *pathname, mode_t mode) {
  * @return              The expanded directory, NULL on error.
  */
 char *ssh_path_expand_tilde(const char *d) {
-    char *h, *r;
+    char *h = NULL, *r;
     const char *p;
     size_t ld;
     size_t lh = 0;
@@ -581,6 +581,7 @@ char *ssh_path_expand_tilde(const char *d) {
 
     if (lh > 0) {
         memcpy(r, h, lh);
+        SAFE_FREE(h);
     }
     memcpy(r + lh, p, ld + 1);