Another 3-in-one commit:

- Unitialized variable in new shadow code caused Sun lamp shadow to not
  work.
- Ipo handle bug: when the handle was vertical it flipped around
- Loop select: unitialized variable caused it to work unpredictable in
  cases. Also found an unitialized var in collaps_edgeuvs().

source/blender/src/editmesh_tools.c

@@ -5960,7 +5960,7 @@ static void collapse_edgeuvs(void)
 	wUVNode *curwnode;
 	wUVEdgeCollect *collectedwuve, *newcollectedwuve;
 	Collection *wuvecollection, *newcollection;
-	int curtag, balanced, collectionfound, vcount;
+	int curtag, balanced, collectionfound= 0, vcount;
 	float avg[2];
 
 	if (!CustomData_has_layer(&G.editMesh->fdata, CD_MTFACE))