Shorten the enemy list in bank 5.

In most banks, z2edit moves code and data packed into the enemy list
area to allow the full 1K to be used as enemy list.

In bank 5, the "goto victory" code overlaps the enemy list.  Since bank
5 is already pretty full and only has 63 rooms (instead of the usual
126), set the list size for bank 5 to 688 bytes to not overwrite the
victory code.

nes/enemylist.cc

@@ -62,6 +62,12 @@ void EnemyListPack::Unpack(int bank) {
     const auto& misc = ConfigLoader<RomInfo>::GetConfig().misc();
 
     bank_ = bank;
+    // In bank5, the victory sequence starts at 0x8b50, so we have fewer
+    // bytes available for the enemy list.
+    // In the other banks, I've taken pains to move things around, but
+    // bank5 is pretty full and has only 63 rooms instead of 126, so
+    // ~half the space should be enough.
+    size_ = (bank == 5) ? 688 : 1024;
     area_.resize(126, 0);
 
     LoadEncounters();
@@ -73,7 +79,7 @@ void EnemyListPack::Unpack(int bank) {
             Address pointer = mapper_->ReadAddr(addr, 2*n);
             uint16_t pa = pointer.address();
             if (pa >= misc.enemy_data_ram() &&
-                    pa < misc.enemy_data_ram() + 1024) {
+                    pa < misc.enemy_data_ram() + size_) {
                 ReadOne(i, pointer);
             }
         } 
@@ -103,7 +109,7 @@ bool EnemyListPack::Pack() {
 
         List& entry = entry_[addr];
         if (entry.newaddr == 0) {
-            if (packed.size() + entry.data.size() > 1024) {
+            if (packed.size() + entry.data.size() > size_) {
                 LOGF(ERROR, "Out of space for enemy list at %d", i);
                 return false;
             }
@@ -127,7 +133,7 @@ bool EnemyListPack::Pack() {
     }
 
     // And copy the enemy lists to the rom
-    packed.resize(1024, 0);
+    packed.resize(size_, 0);
     Address addr;
     addr.set_bank(bank_);
     addr.set_address(misc.enemy_data_rom());

nes/enemylist.h

@@ -25,6 +25,7 @@ class EnemyListPack {
     Mapper* mapper_;
     int newareas_;
     int bank_;
+    size_t size_;
 
     struct List {
         uint16_t newaddr;