Bugreports keep coming in... including real bad one.

- Deformed mesh didnt give correct 'orco' anymore on render
- Mesh editmode, "Separate loose parts", crash on empty mesh (no verts)
- Global undo; buttons sending redraw events gave extra undo push called
  "Make single user or local". That latter was wrong event handling for
  REDRAW event, harmless, until now :)

First one is a real showstopper... bah!

source/blender/include/blendef.h

@@ -154,6 +154,10 @@
 
 /* do_global_buttons(event) */
 
+// (first event)
+#define B_LOCAL_ALONE	20
+
+
 #define B_ACTLOCAL		24	/* __NLA */
 #define	B_ACTALONE		25	/* __NLA */
 #define B_ARMLOCAL		26	/* __NLA */

source/blender/renderconverter/intern/convertBlenderScene.c

@@ -1278,13 +1278,13 @@ static void init_render_mesh(Object *ob)
 
 	me= ob->data;
 
-	/* object_deform changes imat! */
-	do_puno= mesh_modifier(ob, 's');
-	
 	paf = give_parteff(ob);
 	if(paf) {
+		mesh_modifier(ob, 's');
+		
 		if(paf->flag & PAF_STATIC) render_static_particle_system(ob, paf);
 		else render_particle_system(ob, paf);
+		
 		mesh_modifier(ob, 'e');  // end
 		return;
 	}
@@ -1294,7 +1294,6 @@ static void init_render_mesh(Object *ob)
 	MTC_Mat3CpyMat4(imat, ob->imat);
 
 	if(me->totvert==0) {
-		mesh_modifier(ob, 'e');  // end
 		return;
 	}
 	
@@ -1315,7 +1314,18 @@ static void init_render_mesh(Object *ob)
 			}
 		}
 	}
-
+	
+	/* we do this before deform */
+	if(need_orco) {
+		if (mesh_uses_displist(me)) 
+			make_orco_displist_mesh(ob, me->subdivr);
+		else
+			make_orco_mesh(me);
+	}			
+	
+	/* after orco, because this changes mesh vertices (too) */
+	do_puno= mesh_modifier(ob, 's');
+	
 	if (mesh_uses_displist(me)) {
 		dl= me->disp.first;
 
@@ -1349,9 +1359,6 @@ static void init_render_mesh(Object *ob)
 			mvert= dlm->mvert;
 			totvert= dlm->totvert;
 	
-			if(need_orco) {
-				make_orco_displist_mesh(ob, me->subdivr);
-			}
 			ms= NULL; // no stick in displistmesh
 		}
 		
@@ -1363,9 +1370,6 @@ static void init_render_mesh(Object *ob)
 		dl= find_displist(&ob->disp, DL_VERTS);
 		if(dl) extverts= dl->verts;
 	
-		if(need_orco) {
-			make_orco_mesh(me);
-		}
 		ms= me->msticky;
 	}
 	

source/blender/src/editmesh.c

@@ -1270,6 +1270,8 @@ void separatemenu(void)
 {
 	short event;
 
+	if(G.editMesh->verts.first==NULL) return;
+	   
 	event = pupmenu("Separate (No undo!) %t|Selected%x1|All Loose Parts%x2");
 	
 	if (event==0) return;

source/blender/src/headerbuttons.c

@@ -1668,9 +1668,11 @@ void do_global_buttons2(short event)
 	/* general:  Single User is allowed when from==LOCAL 
 	 *			 Make Local is allowed when (from==LOCAL && id==LIB)
 	 */
-	
+		
+	if(event<B_LOCAL_ALONE) return;
+
 	ob= OBACT;
-	
+
 	switch(event) {
 		
 	case B_LAMPALONE: