x11: add KP_Separator to key mapping

At least on some keyboards, the key between '0' and 'Enter' on the
key pad is mapped to KP_Separator. Since X11 VOs accept unicode
input, the mplayer keycode this key generates depended on the numlock
state, and with numlock enabled this mapped to an ASCII character.
This is probably not what the user wanted, since two physical keys
will always map to the same key code.

Map it to KP_DEC.

libvo/wskeys.h

@@ -56,6 +56,7 @@
 #define wsEscape        0xff1b
 #define wsGrayEnter     0xff8d
 #define wsGrayPlus      0xffab
+#define wsGraySeparator 0xffac
 #define wsGrayMinus     0xffad
 #define wsGrayMul       0xffaa
 #define wsGrayDiv       0xffaf

libvo/x11_common.c

@@ -564,6 +564,7 @@ static const struct mp_keymap keymap[] = {
     {wsGray3, KEY_KP3}, {wsGray4, KEY_KP4}, {wsGray5, KEY_KP5},
     {wsGray6, KEY_KP6}, {wsGray7, KEY_KP7}, {wsGray8, KEY_KP8},
     {wsGray9, KEY_KP9}, {wsGrayDecimal, KEY_KPDEC},
+    {wsGraySeparator, KEY_KPDEC},
 
     // numpad without numlock
     {wsGrayInsert, KEY_KPINS}, {wsGrayEnd, KEY_KP1}, {wsGrayDown, KEY_KP2},