rna/py-api fix.

C functions and python used different argument order, this relied on mapping non-keyword arguments to 'REQUIRED' arguments but meant that you could not have an optional, non-keyword argument.

next commit will make order of arguments consistant (currently only changed order that rna wrapped).
(commit 27674 and 27683 by Campbell from render25 branch)

source/blender/editors/interface/interface_utils.c

@@ -157,7 +157,7 @@ void uiDefAutoButsRNA(const bContext *C, uiLayout *layout, PointerRNA *ptr, int
 		else
 			col= NULL;
 
-		uiItemFullR(col, "", 0, ptr, prop, -1, 0, 0);
+		uiItemFullR(col, ptr, prop, -1, 0, 0, "", 0);
 	}
 	RNA_STRUCT_END;
 }