Modify some AI command handlers so rodata isn't explicitly defined in global scope and decompile aiIfChrInSquadronDoingAction

src/include/types.h

@@ -586,7 +586,7 @@ struct chrdata {
 	/*0x291*/ u8 goposhitcount;
 	/*0x292*/ s16 cover;
 	/*0x294*/ struct coord targetlastseenp;
-	/*0x2a0*/ u8 myaction;
+	/*0x2a0*/ u8 myaction[1];
 	/*0x2a1*/ u8 orders;
 	/*0x2a2*/ u8 squadron;
 	/*0x2a3*/ u8 listening;