From e1e3034cf613f6913285fea41bbdac1cbeb2a9a8 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Thu, 25 Jun 2020 15:19:48 +0200
Subject: [PATCH] Fix compiler warning.

---
 src/lib_base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib_base.c b/src/lib_base.c
index 8c1e98a6..eb604538 100644
--- a/src/lib_base.c
+++ b/src/lib_base.c
@@ -301,7 +301,7 @@ LJLIB_ASM(tonumber)		LJLIB_REC(.)
 	while (lj_char_isspace((unsigned char)(*ep))) ep++;
 	if (*ep == '\0') {
 	  if (LJ_DUALNUM && LJ_LIKELY(ul < 0x80000000u+neg)) {
-	    if (neg) ul = -ul;
+	    if (neg) ul = (unsigned long)-(long)ul;
 	    setintV(L->base-1-LJ_FR2, (int32_t)ul);
 	  } else {
 	    lua_Number n = (lua_Number)ul;