address review: move warning in the configure

Author: skirpichev

configure

@@ -4218,11 +4218,6 @@ AS_VAR_IF([with_system_libmpdec], [no],
      the bundled copy of libmpdecimal is scheduled for removal in Python 3.16;
      consider using a system installed mpdecimal library.])])])
 
-AS_IF([test "$with_system_libmpdec" = "yes" && test "$have_mpdec" = "no"],
-      [AC_MSG_WARN([m4_normalize([
-         no system libmpdecimal found; falling back to pure-Python version
-         for the decimal module])])])
-
 # Disable forced inlining in debug builds, see GH-94847
 AS_VAR_IF(
   [with_pydebug], [yes],
@@ -8139,6 +8134,12 @@ PY_STDLIB_MOD([_curses_panel],
 PY_STDLIB_MOD([_decimal],
   [], [test "$have_mpdec" = "yes"],
   [$LIBMPDEC_CFLAGS], [$LIBMPDEC_LIBS])
+
+AS_IF([test "$with_system_libmpdec" = "yes" && test "$have_mpdec" = "no"],
+      [AC_MSG_WARN([m4_normalize([
+         no system libmpdecimal found; falling back to pure-Python version
+         for the decimal module])])])
+
 PY_STDLIB_MOD([_dbm],
   [test -n "$with_dbmliborder"], [test "$have_dbm" != "no"],
   [$DBM_CFLAGS], [$DBM_LIBS])