Use constants for Oam .shape and .size fields

Also some general formatting fixes for constants.

src/egg_hatch.c

@@ -86,10 +86,10 @@ static const struct OamData sOamData_EggHatch =
     .objMode = 0,
     .mosaic = 0,
     .bpp = 0,
-    .shape = 0,
+    .shape = SPRITE_SHAPE(32x32),
     .x = 0,
     .matrixNum = 0,
-    .size = 2,
+    .size = SPRITE_SIZE(32x32),
     .tileNum = 0,
     .priority = 1,
     .paletteNum = 0,
@@ -166,10 +166,10 @@ static const struct OamData sOamData_EggShard =
     .objMode = 0,
     .mosaic = 0,
     .bpp = 0,
-    .shape = 0,
+    .shape = SPRITE_SHAPE(8x8),
     .x = 0,
     .matrixNum = 0,
-    .size = 0,
+    .size = SPRITE_SIZE(8x8),
     .tileNum = 0,
     .priority = 2,
     .paletteNum = 0,