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/ex_getln.c b/src/ex_getln.c
index 00193fe..530efce 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -4166,7 +4166,7 @@
 	len = 0;
 	for (i = 0; i < xp->xp_numfiles; ++i)
 	    len += (long_u)STRLEN(xp->xp_files[i]) + 1;
-	ss = lalloc(len, TRUE);
+	ss = alloc(len);
 	if (ss != NULL)
 	{
 	    *ss = NUL;
@@ -5914,8 +5914,8 @@
 	{
 	    if (newlen)
 	    {
-		temp = (histentry_T *)lalloc(
-				(long_u)(newlen * sizeof(histentry_T)), TRUE);
+		temp = (histentry_T *)alloc(
+				       (long_u)(newlen * sizeof(histentry_T)));
 		if (temp == NULL)   /* out of memory! */
 		{
 		    if (type == 0)  /* first one: just keep the old length */
@@ -6688,7 +6688,7 @@
 	    {
 		/* Need to re-allocate to append the separator byte. */
 		len = STRLEN(val);
-		p = lalloc(len + 2, TRUE);
+		p = alloc(len + 2);
 		if (p != NULL)
 		{
 		    if (type == HIST_SEARCH)
@@ -6774,7 +6774,7 @@
 		{
 		    /* Need to re-allocate to append the separator byte. */
 		    len = vp[3].bv_len;
-		    p = lalloc(len + 2, TRUE);
+		    p = alloc(len + 2);
 		}
 		else
 		    len = 0; /* for picky compilers */