patch 8.1.1386: unessesary type casts for lalloc()

Problem:    Unessesary type casts for lalloc().
Solution:   Remove type casts.  Change lalloc(size, TRUE) to alloc(size).
diff --git a/src/change.c b/src/change.c
index d2aa153..8f0cacb 100644
--- a/src/change.c
+++ b/src/change.c
@@ -282,7 +282,7 @@
 	    return;
     }
 
-    lnr = (listener_T *)alloc_clear((sizeof(listener_T)));
+    lnr = (listener_T *)alloc_clear(sizeof(listener_T));
     if (lnr == NULL)
     {
 	free_callback(callback, partial);