Extend button mapping to full ranges

Extend button code to number mapping to cover full BTN_MOUSE and BTN_MISC
ranges, including undefined codes.

This extends mapping introduced with 0367e387 to the following:

        1       BTN_LEFT        BTN_0       BTN_TOUCH
        2       BTN_MIDDLE      BTN_1       BTN_STYLUS
        3       BTN_RIGHT       BTN_2       BTN_STYLUS2

        8       BTN_SIDE        BTN_3
        9       BTN_EXTRA       BTN_4
        10      BTN_FORWARD     BTN_5
        11      BTN_BACK        BTN_6
        12      BTN_TASK        BTN_7
        13      0x118           BTN_8
        14      0x119           BTN_9
        15      0x11A           0x10A
        16      0x11B           0x10B
        17      0x11C           0x10C
        18      0x11D           0x10D
        19      0x11E           0x10E
        20      0x11F           0x10F

This should fix https://bugs.freedesktop.org/show_bug.cgi?id=30336

Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

src/evdev.c

@@ -2345,13 +2345,13 @@ EvdevUtilButtonEventToButtonNumber(EvdevPtr pEvdev, int code)
             return 2;
         case BTN_RIGHT:
             return 3;
-        case BTN_SIDE ... BTN_TASK:
+        case BTN_SIDE ... BTN_JOYSTICK - 1:
             return 8 + code - BTN_SIDE;
 
         /* Generic buttons */
         case BTN_0 ... BTN_2:
             return 1 + code - BTN_0;
-        case BTN_3 ... BTN_9:
+        case BTN_3 ... BTN_MOUSE - 1:
             return 8 + code - BTN_3;
 
         /* Tablet stylus buttons */