Fix SERVER_NICKLEN off-by-one error

[michaelortmann]

Found by: michaelortmann
Patch by: michaelortmann
Fixes:

One-line summary:
Fix SERVER_NICKLEN off-by-one error

Additional description (if needed):

eggdrop/src/mod/filesys.mod/files.c

Line 433 in 4703f71

nicklen = (*(int *)me->funcs[SERVER_NICKLEN]);

eggdrop/src/mod/modvals.h

Line 75 in 4703f71

#define SERVER_NICKLEN 38

eggdrop/src/mod/server.mod/server.h

Lines 83 to 84 in 4703f71

	#define nick_len (*(int *)(server_funcs[37]))
	#define check_tcl_notc ((int (*)(char *,char *,struct userrec *,char *,char *))server_funcs[38])

Test cases demonstrating functionality (if applicable):
Bug can be triggert by loading server mod and filesys mod, starting eggdrop and issuing .files and get
I didnt analyze the implication any further, but this has crash potential, because currently it would not only set nicklen to a random value (in my test 1447122753) but also trigger a load of misaligned address

[thommey]

nice find!