Fix ESCDELAY check.

[Andrew V. Samoilov]

Hello,

small patch to fix ESCDELAY check.  This variable declared extern, so
test case should be linked instead of compiling.
This fix is usefull for Solaris2.7.

-- 
Regards,
Andrew V. Samoilov.

ChangeLog:

* acinclude.m4 (MC_WITH_NCURSES): Fix ESCDELAY check.

--- acinclude.m4~       Wed Aug 13 16:58:34 2003
+++ acinclude.m4        Fri Aug 15 18:49:55 2003
@@ -822,10 +822,7 @@
                   [mc_cv_ncurses_escdelay],
-                  [AC_TRY_COMPILE([], [
+                  [AC_TRY_LINK([], [
                        extern int ESCDELAY;
-                       int main ()
-                       {
-                         ESCDELAY = 0;
-                       }
+                       ESCDELAY = 0;
                        ],
                        [mc_cv_ncurses_escdelay=yes],
                        [mc_cv_ncurses_escdelay=no])