More stack effect fixes

TODO.FACTOR.txt

@@ -1,11 +1,6 @@
-+ 0.84:
-
-- signal 4 on datastack underflow on mac intel??
-
-========================================================================
-
 + 0.85:
 
+- signal 4 on datastack underflow on mac intel??
 - why is a 'null' type inferred for the output of foo in
   : foo f ;
   : bar foo 4 4 = and ;

contrib/space-invaders/cpu-8080.factor

@@ -1353,7 +1353,7 @@ SYMBOL: last-opcode
 
 : opcode ( -- )
   #! Set the opcode number for the last instruction that was defined.
-  last-instruction global hash unit scan 16 base> ( [word] opcode -- )
+  last-instruction global hash unit scan 16 base>
   dup last-opcode global set-hash instructions set-nth ; parsing
 
 INSTRUCTION: NOP          ; opcode 00 cycles 04 
@@ -1613,8 +1613,8 @@ INSTRUCTION: RST  38H     ; opcode FF cycles 11
     "P3" print
     "256 224" print
     "1" print
-    224 [ ( cpu h -- h )
-      32 [ ( cpu h w -- w )
+    224 [
+      32 [
         over 32 * over +  HEX: 2400 + ! cpu h w addr
         >r pick r> swap cpu-ram nth [
           0 = [