Static assertion for size of save structs

src/save.c

@@ -73,6 +73,12 @@ struct
     SAVEBLOCK_CHUNK(struct PokemonStorage, 8), // SECTOR_ID_PKMN_STORAGE_END
 };
 
+// These will produce an error if a save struct is larger than the space
+// alloted for it in the flash.
+STATIC_ASSERT(sizeof(struct SaveBlock2) <= SECTOR_DATA_SIZE, SaveBlock2FreeSpace);
+STATIC_ASSERT(sizeof(struct SaveBlock1) <= SECTOR_DATA_SIZE * (SECTOR_ID_SAVEBLOCK1_END - SECTOR_ID_SAVEBLOCK1_START + 1), SaveBlock1FreeSpace);
+STATIC_ASSERT(sizeof(struct PokemonStorage) <= SECTOR_DATA_SIZE * (SECTOR_ID_PKMN_STORAGE_END - SECTOR_ID_PKMN_STORAGE_START + 1), PokemonStorageFreeSpace);
+
 u16 gLastWrittenSector;
 u32 gLastSaveCounter;
 u16 gLastKnownGoodSector;