Fix arrow key for tmux

Author: Nicop06

autoload/ctrlp.vim

@@ -910,7 +910,7 @@ fu! s:MapSpecs()
 	if !( exists('s:smapped') && s:smapped == s:bufnr )
 		" Correct arrow keys in terminal
 		if ( has('termresponse') && v:termresponse =~ "\<ESC>" )
-			\ || &term =~? '\vxterm|<k?vt|gnome|screen|linux|ansi'
+			\ || &term =~? '\vxterm|<k?vt|gnome|screen|linux|ansi|tmux'
 			for each in ['\A <up>','\B <down>','\C <right>','\D <left>']
 				exe s:lcmap.' <esc>['.each
 			endfo