Do a bounds check not to exceed NUM_FACTORY_TYPES.

git-svn-id: https://warzone2100.svn.sourceforge.net/svnroot/warzone2100/branches/2.3@11684 4a71c877-e1ca-e34f-864e-861f7616d084
(cherry picked from commit 4b45c471c60d2ae1d9c25e4f96f2c7574f73e1f1)

src/hci.c

@@ -3531,6 +3531,10 @@ static void orderFactories(void)
 		{
 			inc = 0;
 			type++;
+			if (type > NUM_FACTORY_TYPES)
+			{
+				type = 0;
+			}
 		}
 		objectInc = 0;
 	}