Bug fix #2629

Aye... OpenGL cannot draw concave (C shaped) polygons... that screws up the
Lasso tool, when it uses backbuffer selection.
Examined for little while the GLU Tesselation library, but apart from its
nightmarish structure, it's even stupid (no builtin clock/counterclock).

So, instead coded a DispList based function using Blender's edgefill.
Works like a charm! :)

source/blender/blenkernel/BKE_displist.h

@@ -147,6 +147,7 @@ void boundbox_displist(struct Object *ob);
 void imagestodisplist(void);
 void reshadeall_displist(void);
 void test_all_displists(void);
+void filldisplist(struct ListBase *dispbase, struct ListBase *to);
 
 #endif
 

source/blender/blenkernel/intern/displist.c

@@ -1353,7 +1353,7 @@ static void curve_to_displist(ListBase *nubase, ListBase *dispbase)
 }
 
 
-static void filldisplist(ListBase *dispbase, ListBase *to)
+void filldisplist(ListBase *dispbase, ListBase *to)
 {
 	EditVert *eve, *v1, *vlast;
 	EditFace *efa;
@@ -1365,11 +1365,6 @@ static void filldisplist(ListBase *dispbase, ListBase *to)
 	if(dispbase==0) return;
 	if(dispbase->first==0) return;
 
-	/* tijd= clock(); */
-	/* bit-wise and comes after == .... so this doesn't work...  */
-/*  	if(G.f & G_PLAYANIM == 0) waitcursor(1); */
-	if( !(G.f & G_PLAYANIM) ) waitcursor(1);
-
 	while(cont) {
 		cont= 0;
 		totvert=0;
@@ -1473,12 +1468,6 @@ static void filldisplist(ListBase *dispbase, ListBase *to)
 	}
 	
 	/* do not free polys, needed for wireframe display */
-	
-	/* same as above ... */
-/*  	if(G.f & G_PLAYANIM == 0) waitcursor(0); */
-	if( !(G.f & G_PLAYANIM) ) waitcursor(0);
-	/* printf("time: %d\n",(clock()-tijd)/1000); */
-
 }
 
 static void bevels_to_filledpoly(Curve *cu, ListBase *dispbase)