Generally, changed working with tags as strings to as values.

This seems both cheaper and safer; what's not to like?

src/arith/integer.c

@@ -46,11 +46,10 @@ struct cons_pointer make_integer( int64_t value, struct cons_pointer more ) {
     debug_print( L"Entering make_integer\n", DEBUG_ALLOC );
 
     if ( integerp( more ) || nilp( more ) ) {
-        result = allocate_cell( INTEGERTAG );
+        result = allocate_cell( INTEGERTV );
         struct cons_space_object *cell = &pointer2cell( result );
         cell->payload.integer.value = value;
         cell->payload.integer.more = more;
-
     }
 
     debug_print( L"make_integer: returning\n", DEBUG_ALLOC );

src/arith/ratio.c

@@ -315,7 +315,7 @@ struct cons_pointer make_ratio( struct cons_pointer dividend,
     if ( integerp( dividend ) && integerp( divisor ) ) {
         inc_ref( dividend );
         inc_ref( divisor );
-        result = allocate_cell( RATIOTAG );
+        result = allocate_cell( RATIOTV );
         struct cons_space_object *cell = &pointer2cell( result );
         cell->payload.ratio.dividend = dividend;
         cell->payload.ratio.divisor = divisor;

src/arith/real.c

@@ -19,7 +19,7 @@
  * @return a real number cell wrapping this value.
  */
 struct cons_pointer make_real( long double value ) {
-    struct cons_pointer result = allocate_cell( REALTAG );
+    struct cons_pointer result = allocate_cell( REALTV );
     struct cons_space_object *cell = &pointer2cell( result );
     cell->payload.real.value = value;