Add missing const - should fix a few Qt4 warnings

share/pda-forwardb16x16.xpm

 /* XPM */
-static char * familiar_forwardb16x16_xpm[] = {
+static const char *const familiar_forwardb16x16_xpm[] = {
 "16 16 2 1",
 " 	c None",
 ".	c #000000",

share/pda-openb16x16.xpm

 /* XPM */
-static char * familiar_openb16x16_xpm[] = {
+static const char *const familiar_openb16x16_xpm[] = {
 "16 16 2 1",
 " 	c None",
 ".	c #000000",

share/pda-pauseb16x16.xpm

 /* XPM */
-static char * familiar_pauseb16x16_xpm[] = {
+static const char *const familiar_pauseb16x16_xpm[] = {
 "16 16 2 1",
 " 	c None",
 ".	c #000000",

share/pda-playb16x16.xpm

 /* XPM */
-static char * familiar_playb16x16_xpm[] = {
+static const char *const familiar_playb16x16_xpm[] = {
 "16 16 2 1",
 " 	c None",
 ".	c #000000",

share/pda-playlistb16x16.xpm

 /* XPM */
-static char * familiar_playlistb16x16_xpm[] = {
+static const char *const familiar_playlistb16x16_xpm[] = {
 "16 16 2 1",
 " 	c None",
 ".	c #000000",

share/pda-preferencesb16x16.xpm

 /* XPM */
-static char * familiar_preferencesb16x16_xpm[] = {
+static const char *const familiar_preferencesb16x16_xpm[] = {
 "16 16 2 1",
 " 	c None",
 ".	c #000000",

share/pda-rewindb16x16.xpm

 /* XPM */
-static char * familiar_rewindb16x16_xpm[] = {
+static const char *const familiar_rewindb16x16_xpm[] = {
 "16 16 2 1",
 " 	c None",
 ".	c #000000",

share/pda-stopb16x16.xpm

 /* XPM */
-static char * familiar_stopb16x16_xpm[] = {
+static const char *const familiar_stopb16x16_xpm[] = {
 "16 16 2 1",
 " 	c None",
 ".	c #000000",

share/vlc16x16.xpm

 /* XPM */
-static char *vlc16x16_xpm[] = {
+static const char *constvlc16x16_xpm[] = {
 /* width height ncolors chars_per_pixel */
 "16 16 57 2",
 /* colors */

share/vlc32x32.xpm

 /* XPM */
-static char *vlc_xpm[] = {
+static const char *constvlc_xpm[] = {
 /* width height ncolors chars_per_pixel */
 "32 32 144 2",
 /* colors */