Remove a redundant arg `$GD_LIBS`

It might be a typo of `$GDLIB_LIBS`,
and, if so, it is redundant, since `$LDFLAGS` contains `$GDLIB_LIBS`.

diff --git a/configure.ac b/configure.ac
index 7f6d3e55599511770d5fae8048bb1f7c902f44af..c22810f00688cf512da50676f9c67122626b421e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2420,7 +2420,7 @@ if test "x$use_gd" = "x"; then
           AC_MSG_WARN(Optional GD library not available)
           use_gd="No (library not found)"
          with_libgd="no"
-        ], $GD_LIBS)
+        ])
       fi
       LDFLAGS=$save_LDFLAGS
       CPPFLAGS=$save_CPPFLAGS