Update usage of deprecated XKeycodeToKeysym function

src/kernel/qapplication_x11.cpp

@@ -2147,7 +2147,7 @@ void qt_init_internal( int *argcptr, char **argv,
 		for (i = 0; i < map->max_keypermod; i++) {
 		    if (map->modifiermap[mapIndex]) {
 			KeySym sym =
-			    XKeycodeToKeysym(appDpy, map->modifiermap[mapIndex], 0);
+			    XkbKeycodeToKeysym(appDpy, map->modifiermap[mapIndex], 0, 0);
 			if ( qt_alt_mask == 0 &&
 			     ( sym == XK_Alt_L || sym == XK_Alt_R ) ) {
 			    qt_alt_mask = 1 << maskIndex;
@@ -2177,7 +2177,7 @@ void qt_init_internal( int *argcptr, char **argv,
 		for ( i = 0; i < map->max_keypermod; i++ ) {
 		    if ( map->modifiermap[ mapIndex ] ) {
 			KeySym sym =
-			    XKeycodeToKeysym( appDpy, map->modifiermap[ mapIndex ], 0 );
+			    XkbKeycodeToKeysym( appDpy, map->modifiermap[ mapIndex ], 0, 0 );
 			if ( sym == XK_Mode_switch ) {
 			    qt_mode_switch_remove_mask |= 1 << maskIndex;
 			}