Two little fixes in administrating new Mesh edges. Solves crash when

joining newly created (Added) Mesh with others...

source/blender/src/buttons_editing.c

@@ -1840,7 +1840,10 @@ void do_meshbuts(unsigned short event)
 		
 		case B_MAKEEDGES:
 			/* in editmode we only have to set edge pointer */
-			if(ob==G.obedit) me->medge= MEM_callocN(sizeof(MEdge), "fake mesh edge");
+			if(ob==G.obedit) {
+				me->medge= MEM_callocN(sizeof(MEdge), "fake mesh edge");
+				me->totedge= 1;
+			}
 			else make_edges(me);
 			allqueue(REDRAWBUTSEDIT, 0);
 			break;

source/blender/src/editmesh.c

@@ -1275,7 +1275,7 @@ void load_editMesh_real(Mesh *me, int undo)
 
 	if(me->medge) MEM_freeN(me->medge);
 	me->medge= medge;
-	me->totedge= totedge;
+	if(medge) me->totedge= totedge; else me->totedge= 0;
 	
 	if(me->mface) MEM_freeN(me->mface);
 	me->mface= mface;