[LEAK-INFORMED] match the rest of pokedex_screen

include/pokedex_screen.h

@@ -11,6 +11,11 @@
 #define DEX_CATEGORY_URBAN         7
 #define DEX_CATEGORY_RARE          8
 
+#define DEX_CATEGORY_SIZE          (sizeof(gDexCategories)/sizeof(struct {                                      \
+                                                                      const struct PokedexCategoryPage * page;  \
+                                                                      u8 count;                                 \
+                                                                  }))
+
 #include "pokedex.h"
 
 extern const struct PokedexEntry gPokedexEntries[];