tdeprint: Use 'const' for list of files to print.

This resolves issue #268.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 9f72914c1d)

tdeprint/cups/cupsdoprint.c

@@ -146,7 +146,7 @@ int main(int argc, char* argv[])
 	char	*a;
 	cups_option_t	*options = NULL;
 	int		num_options = 0;
-	char*	files[100] = {0};
+	const char*	files[100] = {0};
 	int	num_files = 0;
 	int	jobID = 0;