[Bug-gnubg] Lates code - warnings

[Massimiliano Maini]

gtkboard.c: In function 'cube_widget_expose':
gtkboard.c:3931: warning: pointer targets in passing argument 7 of
'CopyAreaRotateClip' differ in signedness
render.h:130: note: expected 'unsigned char *' but argument is of type 'char *'
gtkboard.c:3935: warning: pointer targets in passing argument 4 of
'DrawAlphaImage' differ in signedness
gtkboard.c:3476: note: expected 'unsigned char *' but argument is of
type 'char *'
gtkboard.c: In function 'board_cube_widget':
gtkboard.c:3996: warning: pointer targets in passing argument 2 of
'RenderCube' differ in signedness
render.h:171: note: expected 'unsigned char *' but argument is of type 'char *'
gtkboard.c:3997: warning: pointer targets in passing argument 2 of
'RenderCubeFaces' differ in signedness
render.h:172: note: expected 'unsigned char *' but argument is of type 'char *'
gtkboard.c:3997: warning: pointer targets in passing argument 4 of
'RenderCubeFaces' differ in signedness
render.h:172: note: expected 'unsigned char *' but argument is of type 'char *'

MaX.