PR modula2/112110: fails to build on freebsd when compiling wrapclock.cc

This patch fixes a mangled #if #endif conditional section within
wrapclock.cc.  The conditional section in wrapclock_timezone
should return 0 rather than return timezone.

libgm2/ChangeLog:

	PR modula2/112110
	* libm2iso/wrapclock.cc (timezone): Return 0 if unable
	to get the timezone from the tm struct.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>

libgm2/libm2iso/wrapclock.cc

@@ -235,16 +235,9 @@ EXPORT(timezone) (void)
       localtime_r (&time, &result);
       return result.tm_gmtoff;
     }
-  else
 #endif
 #endif
-    {
-#if defined(HAVE_TIMEZONE)
-      return timezone;
-#else
-      return 0;
-#endif
-    }
+  return 0;
 }
 
 /* istimezone returns 1 if timezone in wrapclock.cc can resolve the