Ensure the ZZZZ magic word is reproducible.

This happens by making the SEED command also regenerate the magic word.

main.c

@@ -148,6 +148,8 @@ static bool fallback_handler(signed char *buf)
     if (sscanf(buf, "seed %ld", &sv) == 1) {
 	set_seed(sv);
 	printf("Seed set to %ld\n", sv);
+	// here we reconfigure any global game state that uses random numbers
+	ZZWORD=RNDVOC(3,0)+MESH*2;
 	return true;
     }
     return false;

tests/dwarf.chk

@@ -7,6 +7,7 @@ You are standing at the end of a road before a small brick building.
 Around you is a forest.  A small stream flows out of the building and 
 down a gully.  
 
+<<<<<<< HEAD
 > seed 1495763690
 Seed set to 1495763690
 
@@ -14,6 +15,10 @@ You're in front of building.
 
 > seed 1495752222
 Seed set to 1495752222
+=======
+> seed 1494912171
+Seed set to 1494912171
+>>>>>>> f9eca41 (Ensure the ZZZZ magic word is reproducible.)
 
 You're in front of building.  
 

tests/dwarf.log

@@ -0,0 +1,59 @@
+## Death by dwarf.
+n
+seed 1494912171
+in
+take keys
+take lamp
+out
+down
+s
+s
+open grate
+down
+west
+take cage
+west
+light lamp
+take rod
+xyzzy
+xyzzy
+west
+drop rod
+west
+take bird
+east
+take rod
+west
+west
+down
+south
+take gold
+n
+n
+drop bird
+west
+take coins
+e
+s
+drop cage
+take jewelry
+take axe
+n
+n
+n
+plugh
+inven
+drop jewelry
+drop gold
+inven
+drop keys
+plugh
+s
+s
+up
+w
+wave rod
+w
+take diamonds
+e
+n