Misc stuff 7 (#112)

* document zcb a tiny bit and add some item manager setters

* add more item manager setters

* add more and more item manager setters

* ...

* gcc fix

* gcc fix 2

include/Unknown/UnkStruct_02049bac.hpp

@@ -12,7 +12,11 @@ union Date {
     u16 data[1];
 
     void operator=(Date &from) {
+#if __MWERKS__
         this->data = from.data;
+#else
+        this->data[0] = from.data[0];
+#endif
     }
 
     void operator=(s16 from) {

include/Unknown/UnkStruct_027e0ce0.hpp

@@ -439,7 +439,7 @@ public:
 
     // data_ov026_0213562c
     /* 00 */ virtual ~UnkStruct_027e0ce0_38() override;
-    /* 0C */ virtual bool vfunc_0C() override;
+    /* 0C */ virtual bool vfunc_0C(const UnkStruct_ov031_020e54d4 *param1, unk32 param2) override;
 
     // overlay 26
     void func_ov026_020dc8f0();