chore(model): correct forward declaration types

src/model/CM2Model.hpp

@@ -11,16 +11,16 @@
 class CAaBox;
 class CM2Scene;
 class CM2Shared;
-class M2Batch;
-class M2Data;
-class M2ModelBone;
-class M2ModelBoneSeq;
-class M2ModelCamera;
-class M2ModelColor;
-class M2ModelLight;
-class M2ModelTextureWeight;
-class M2SequenceFallback;
-class M2TrackBase;
+struct M2Batch;
+struct M2Data;
+struct M2ModelBone;
+struct M2ModelBoneSeq;
+struct M2ModelCamera;
+struct M2ModelColor;
+struct M2ModelLight;
+struct M2ModelTextureWeight;
+struct M2SequenceFallback;
+struct M2TrackBase;
 
 struct CM2ModelCall {
     uint32_t type = -1;

src/model/CM2SceneRender.hpp

@@ -10,11 +10,11 @@ class CM2Cache;
 class CM2Lighting;
 class CM2Model;
 class CM2Shared;
-class M2Batch;
-class M2Data;
-class M2Element;
-class M2Material;
-class M2SkinSection;
+struct M2Batch;
+struct M2Data;
+struct M2Element;
+struct M2Material;
+struct M2SkinSection;
 
 class CM2SceneRender {
     public:

src/model/CM2Shared.hpp

@@ -12,10 +12,10 @@ class CGxPool;
 class CM2Cache;
 class CM2Model;
 class CShaderEffect;
-class M2Batch;
-class M2Data;
-class M2SkinProfile;
-class M2SkinSection;
+struct M2Batch;
+struct M2Data;
+struct M2SkinProfile;
+struct M2SkinSection;
 class SFile;
 
 class CM2Shared {