0031004: Coding - eliminate warnings issued by gcc 9.1.0

Fixed -Wrestrict warning within OSD::SetSignal().

Fixed -Wdeprecated-copy warning by adding missing counterpart
in pair copy constructor / assignment operator or by removing trivial constructor.

AdvApp2Var_Node, AdvApp2Var_Patch are now declared as Handle.
AdvApp2Var_Iso is now passed by Handle.

Disabled operator= for TDF_Transaction and TDF_IDFilter.

Standard.cxx - fixed GCC version mischeck causing building failure with experimental GCC versions.

TopOpeBRepDS_EXPORT.cxx - fixed -Wmaybe-uninitialized warnings.

src/Graphic3d/Graphic3d_CubeMapOrder.hxx

@@ -138,6 +138,10 @@ public:
     return &Order;
   }
 
+  //! Copy constructor.
+  Graphic3d_ValidatedCubeMapOrder (const Graphic3d_ValidatedCubeMapOrder& theOther)
+  : Order (theOther.Order) {}
+
 public:
 
   const Graphic3d_CubeMapOrder Order; //!< Completely valid order
@@ -146,13 +150,11 @@ private:
 
   //! Only Graphic3d_CubeMapOrder can generate Graphic3d_ValidatedCubeMapOrder in 'Validated' method.
   Graphic3d_ValidatedCubeMapOrder(const Graphic3d_CubeMapOrder theOrder)
-    :
-    Order(theOrder)
-  {}
+  : Order(theOrder) {}
 
   //! Deleted 'operator='
   Graphic3d_ValidatedCubeMapOrder& operator= (const Graphic3d_ValidatedCubeMapOrder&);
 
 };
 
-#endif // _Graphic3d_CubeMapOrder_HeaderFile
+#endif // _Graphic3d_CubeMapOrder_HeaderFile

src/Graphic3d/Graphic3d_Vertex.hxx

@@ -35,12 +35,6 @@ public:
     SetCoord (0.0f, 0.0f, 0.0f);
   }
 
-  //! Creates a point with coordinates identical to thePoint.
-  Graphic3d_Vertex (const Graphic3d_Vertex& thePoint)
-  {
-    SetCoord (thePoint.X(), thePoint.Y(), thePoint.Z());
-  }
-
   //! Creates a point with theX, theY and theZ coordinates.
   Graphic3d_Vertex (const Standard_ShortReal theX,
                     const Standard_ShortReal theY,

src/Graphic3d/Graphic3d_WorldViewProjState.hxx

@@ -141,15 +141,6 @@ public:
         && myWorldViewState  == theOther.myWorldViewState;
   }
 
-  //! Copy world view projection state.
-  void operator = (const Graphic3d_WorldViewProjState& theOther)
-  {
-    myIsValid         = theOther.myIsValid;
-    myCamera          = theOther.myCamera;
-    myProjectionState = theOther.myProjectionState;
-    myWorldViewState  = theOther.myWorldViewState;
-  }
-
 private:
 
   Standard_Boolean    myIsValid;