patch 9.0.0498: various small issues

Problem:    Various small issues.
Solution:   Various small fixes.
diff --git a/src/if_xcmdsrv.c b/src/if_xcmdsrv.c
index 20427c7..1f6b8d2 100644
--- a/src/if_xcmdsrv.c
+++ b/src/if_xcmdsrv.c
@@ -774,7 +774,7 @@
 /*
  * Wait for replies from id (win)
  * When "timeout" is non-zero wait up to this many seconds.
- * Return 0 and the malloc'ed string when a reply is available.
+ * Return 0 and the allocated string in "*str" when a reply is available.
  * Return -1 if the window becomes invalid while waiting.
  */
     int