patch 8.1.1393: unnecessary type casts

Problem:    Unnecessary type casts.
Solution:   Remove type casts from alloc() and lalloc() calls. (Mike Williams)
diff --git a/src/quickfix.c b/src/quickfix.c
index 69ffc9c..4f3db39 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -1815,7 +1815,7 @@
 
     if (title != NULL)
     {
-	char_u *p = alloc((int)STRLEN(title) + 2);
+	char_u *p = alloc(STRLEN(title) + 2);
 
 	qfl->qf_title = p;
 	if (p != NULL)