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).

src/terminal.c

@@ -3925,7 +3925,7 @@ static VTermParserCallbacks parser_fallbacks = {
     static void *
 vterm_malloc(size_t size, void *data UNUSED)
 {
-    return alloc_clear((unsigned) size);
+    return alloc_clear(size);
 }
 
     static void