Fixed various errors with Blender allowing editing Library linked data.

CTRL+V on buttons
NKEY Panels
join mesh
join curve
editing buttons
boolean
vpaint
faceselect
Manipulator

Also; Transform() got in useless loop when you entered without anything
selected. Not sure why Martin recoded it this way... maybe as a first
step to handlerify it? For evil Python Aussie Bosses? :P

source/blender/src/interface.c

@@ -431,9 +431,10 @@ static int ui_but_copy_paste(uiBut *but, char mode)
 	static float rgb[3];
 	void *poin;
 	
+	if(mode=='v' && but->lock) return;
+	
 	poin= but->poin;
 		
-		
 	if ELEM3(but->type, NUM, NUMSLI, HSVSLI) {
 	
 		if(mode=='c') {