fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing The only 100% safe way to pass a NULL pointer as a function argument in K&R C is to cast 0 to a pointer type; failing to do so may cause mysterious bugs (invalid stack frames or garbage in argument registers) on 64-bit machines. This issue has already been fixed in most of FC host tools, but I just found some missed spots: passing of NULL UDH to PDU encoding functions in fcup-smsend[mult] in the case of single (not concatenated) SMS.

/* global variables for the TIFFS reader code - extern declarations */

extern struct inode *tiffs_active_index;
extern int tiffs_root_ino;
extern int tiffs_init_done;

extern const u32 tiffs_base_addr;
extern const u32 tiffs_sector_size;
extern const int tiffs_nsectors;