Match and link CDecalDescription, nearly match CWeaponDescription

Former-commit-id: 181f0435d2

include/Weapons/CDecalDescription.hpp

@@ -13,8 +13,11 @@ public:
     rstl::single_ptr< CColorElement > x10_CLR;
     rstl::single_ptr< CUVElement > x14_TEX;
     bool x18_ADD;
+    SQuadDescr();
   };
 
+  CDecalDescription();
+
 // private:
   SQuadDescr x0_quad1;
   SQuadDescr x1c_quad2;