0031035: Coding - uninitialized class fields reported by Visual Studio Code Analysis

Added initialization of fields that had not initialization
Added default constructors to classes without constructors

src/Extrema/Extrema_GenLocateExtCS.cxx

@@ -32,6 +32,8 @@
 //purpose  : 
 //=======================================================================
 Extrema_GenLocateExtCS::Extrema_GenLocateExtCS()
+: myDone(Standard_False),
+  mySqDist(RealLast())
 {
 }