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/blenkernel/intern/ipo.c

@@ -552,7 +552,7 @@ void sort_time_ipocurve(IpoCurve *icu)
 						ok= 1;
 					}
 				}
-				if(bezt->vec[0][0]>=bezt->vec[1][0] && bezt->vec[2][0]<=bezt->vec[1][0]) {
+				if(bezt->vec[0][0]>bezt->vec[1][0] && bezt->vec[2][0]<bezt->vec[1][0]) {
 					SWAP(float, bezt->vec[0][0], bezt->vec[2][0]);
 					SWAP(float, bezt->vec[0][1], bezt->vec[2][1]);
 				}
@@ -2210,7 +2210,6 @@ void add_to_cfra_elem(ListBase *lb, BezTriple *bezt)
 void make_cfra_list(Ipo *ipo, ListBase *elems)
 {
 	IpoCurve *icu;
-	CfraElem *ce;
 	BezTriple *bezt;
 	int a;
 	

source/blender/render/intern/source/shadeoutput.c

@@ -1022,7 +1022,7 @@ float lamp_get_visibility(LampRen *lar, float *co, float *lv, float *dist)
 		return 1.0f;
 	}
 	else {
-		float visifac, t;
+		float visifac= 1.0f, t;
 		
 		VECSUB(lv, co, lar->co);
 		*dist= sqrt( INPR(lv, lv));

source/blender/src/editmesh_mods.c

@@ -1531,7 +1531,7 @@ void loop_multiselect(int looptype)
 static void mouse_mesh_loop(void)
 {
 	EditEdge *eed;
-	int select;
+	int select= 1;
 	int dist= 50;
 	
 	eed= findnearestedge(&dist);

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))