Committing a patch to prevent segfaulting during "extresist" when

non-Manhattan geometry is analyzed for resistance extraction.
This patch merely prevents the crash condition.  It does not
solve the root of the problem, which is that split tiles can
belong to two different nets, but the tile can hold extraction
information for at most one of those nets.

VERSION

@@ -1 +1 @@
-8.3.473
+8.3.474

resis/ResMain.c

@@ -432,7 +432,7 @@ ResFindNewContactTiles(contacts)
 		(contacts->cp_currentcontact) += 1;
 		j->contactList = ce;
 	    }
-	    else
+	    else if (!IsSplit(tile))
 	    {
 		TileType ttype = TiGetTypeExact(tile);
 		if (DBIsContact(ttype))

resis/ResUtils.c

@@ -428,6 +428,10 @@ ResAddPlumbing(tile, arg)
 		{
 		    t1 = (SplitSide(tp1)) ? SplitRightType(tp1) :
 				SplitLeftType(tp1);
+		    /* Check in case this is the wrong side */
+		    if (ExtCurStyle->exts_device[t1] == NULL)
+			t1 = (SplitSide(tp1)) ? SplitLeftType(tp1) :
+				SplitRightType(tp1);
 		}
 		else
 		    t1 = TiGetTypeExact(tp1);