[cppcheck-fix][instance-destroyed-immediatly]

This commit fixes following cppcheck-1.49 errors:
[src/Extrema/Extrema_GenExtCS.cxx:311]: (error) Instance of 'math_FunctionSetRoot' object is destroyed immediately.
[src/MeshTest/MeshTest.cxx:1243]: (error) Instance of 'BRepMesh_IncrementalMesh' object is destroyed immediately.
[src/QABugs/QABugs_19.cxx:124]: (error) Instance of 'BRepAlgo_Cut' object is destroyed immediately.
[src/StdSelect/StdSelect_BRepSelectionTool.cxx:88]: (error) Instance of 'BRepMesh_IncrementalMesh' object is destroyed immediately.
[src/TestTopOpe/TestTopOpe_HDSCommands.cxx:213]: (error) Instance of 'Standard_Failure' object is destroyed immediately.