0031007: Coding - eliminate warnings issued while compiling with -pedantic flag

Removed duplicating semicolons ;;.
Removed redundant semicolon at namespace closure.

src/Adaptor3d/Adaptor3d_TopolTool.cxx

@@ -540,7 +540,7 @@ Standard_Boolean  Adaptor3d_TopolTool::IsThePointOn(const gp_Pnt2d& P,
     if (surumin || survmin || surumax || survmax) {
       return(Standard_True);
     }
-    return(Standard_False);;
+    return Standard_False;
   }
 }