[gnome-commander] Fix warning about using AC_PROG_LEX without noyywrap (or yywrap)

[Uwe Scholz <uwescholz src gnome org>]

commit f03ebb16cb1f2310c15fecbcaf2ed788adb9284c
Author: Uwe Scholz <u scholz83 gmx de>
Date:   Sun Nov 7 21:28:45 2021 +0100

    Fix warning about using AC_PROG_LEX without noyywrap (or yywrap)

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 6bb736d9..659e2d04 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,7 @@ AX_CXX_COMPILE_STDCXX_11
 
 AC_PROG_CC
 AC_PROG_CXX
-AM_PROG_LEX
+AC_PROG_LEX(noyywrap)
 LT_INIT
 
 dnl ===================