Fix stack effect decl in x86/allot

TODO.FACTOR.txt

@@ -3,9 +3,7 @@
 - sometimes fep when closing window
 - x86: load-allot-ptr doesn't have a stack effect? why?
 - mov 0x0(%esi),%ecx  why?
-- mac intel: perhaps its not a good idea using ebx as allot-tmp-reg
-- %allot-bignum-signed-2 still has issues on ppc
-- fix %allot-bignum-signed-1/2 on x86
+- %allot-bignum-signed-2 is broken on both platforms
 
 + ui:
 

library/compiler/x86/allot.factor

@@ -3,7 +3,7 @@
 IN: compiler
 USING: kernel assembler kernel-internals namespaces math ;
 
-: load-zone-ptr ( reg -- )
+: load-zone-ptr ( -- )
     #! Load pointer to start of zone array
     allot-tmp-reg 0 MOV
     "generations" f rel-absolute-cell rel-dlsym