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/ex_getln.c b/src/ex_getln.c
index 530efce..80f1855 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -5914,8 +5914,7 @@
 	{
 	    if (newlen)
 	    {
-		temp = (histentry_T *)alloc(
-				       (long_u)(newlen * sizeof(histentry_T)));
+		temp = (histentry_T *)alloc(newlen * sizeof(histentry_T));
 		if (temp == NULL)   /* out of memory! */
 		{
 		    if (type == 0)  /* first one: just keep the old length */
@@ -6655,7 +6654,7 @@
 	    viminfo_history[type] = NULL;
 	else
 	    viminfo_history[type] = (histentry_T *)lalloc(
-				  (long_u)(len * sizeof(histentry_T)), FALSE);
+					    len * sizeof(histentry_T), FALSE);
 	if (viminfo_history[type] == NULL)
 	    len = 0;
 	viminfo_hislen[type] = len;