Decomp more actors (#198)

include/PR/mbi.h

@@ -91,6 +91,7 @@
 #define	NUM_SEGMENTS		(16)
 #define	SEGMENT_OFFSET(a)	((unsigned int)(a) & 0x00ffffff)
 #define	SEGMENT_NUMBER(a)	(((unsigned int)(a) << 4) >> 28)
+#define SEGMENT_NUMBER2(a)  ((unsigned int)(a) >> 24)
 #define	SEGMENT_ADDR(num, off)	(((num) << 24) + (off))
 
 #ifndef NULL

include/actor_types.h

@@ -71,6 +71,19 @@ struct FallingRock {
     /* 0x30 */ UnkActorInner unk30;
 }; // size = 0x70
 
+// Data in course_choco_mountain_dl.bin
+// 7230?
+// func_8029CF0C
+struct innerFR {
+    Vec4s data;
+};
+
+typedef union {
+    struct innerFR unk;
+    s32 unk2;
+    s32 unk3;
+} UnknownFallingRock;
+
 struct YoshiValleyEgg {
     /* 0x00 */ s16 type;
     /* 0x02 */ s16 flags;