Fix problems related to LCTRL/SCTRL
Fix problems related to LCTRL/SCTRL

LCTRL/SCTRL now returns/sets REAL stack or frame pointer (and not amx->stk/frm).
This is needed to make some compiler-generated codes work, for example:

main()
{
	for(new i=0;i<1;i++)  goto v;
	v:
}

is compiled to:

00000008  proc
0000000c  push.c 00000000
00000014  jump 00000038
0000001c  inc.s fffffffc
00000024  load.s.pri fffffffc
0000002c  const.alt 00000001
00000034  jsgeq 00000080
0000003c  jump 00000090
00000044  jump 00000060
0000004c  stack 00000004
00000054  lctrl 00000005
0000005c  sctrl 00000004
00000064  zero.pri
00000068  retn

Additionally I decided to remove CIP case in SCTRL as it seems useless and just
can mess things up.

oscar-broman/samp-plugin-jit,Zeex/samp-plugin-jit,oscar-broman/samp-plugin-jit,Zeex/samp-plugin-jit