[libxslt] Update GCC compiler warnings

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 0166191a342b192e3907cd85b58dcfa764a4691a
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Thu Sep 1 07:51:27 2022 +0200

    Update GCC compiler warnings
    
    Use warning list from libxml2 excluding -pedantic.

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index baeee600..873be77d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -338,7 +338,7 @@ if test "${GCC}" != "yes" ; then
                ;;
     esac
 else
-    CFLAGS="${CFLAGS} -Wall -Wextra -Wformat=2 -Wmissing-format-attribute -Wshadow"
+    CFLAGS="${CFLAGS} -Wall -Wextra -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -Waggregate-return 
-Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Winline -Wredundant-decls"
     case "${host}" in
           alpha*-*-linux* )
               CFLAGS="${CFLAGS} -mieee"