Add first vertex in match group to the head of the group, so indices are...

Add first vertex in match group to the head of the group, so indices are consequetive (might have a small performance benefit, and looks more like official nifs).

src/obj/NiTriShapeData.cpp

@@ -213,6 +213,8 @@ void NiTriShapeData::DoMatchDetection() {
 
 		/* we may find a valid group for this vertex */
 		MatchGroup group;
+		/* this vertex belongs to the group as well */
+		group.vertexIndices.push_back(i);
 
 		// Find all vertices that match this one.
 		for ( unsigned short j = i + 1; j < vertices.size(); ++j ) {
@@ -234,10 +236,7 @@ void NiTriShapeData::DoMatchDetection() {
 		}
 
 		/* the currently observed vertex shares a normal with others */
-		if ( ( group.numVertices = group.vertexIndices.size() ) > 0 ) {
-			/* this vertex belongs to the group as well */
-			group.vertexIndices.push_back(i);
-			
+		if ( ( group.numVertices = group.vertexIndices.size() ) > 1 ) {
 			/* mark all of the participating vertices to belong to a group */
 			int groupid = matchGroups.size() + 1;
 			for ( int n = 0; n < group.numVertices; n++ )