0026281: BRepCheck_Edge::Tolerance() raises exception on the given shapes

The reason of the exception has been eliminated

Test-cases for issue #26281

src/BSplCLib/BSplCLib.cxx

@@ -275,6 +275,10 @@ void BSplCLib::LocateParameter
 
     while (val <= Eps) {
       KnotIndex++;
+
+      if(KnotIndex >= Knots.Upper())
+        break;
+
       K1 = K2;
       K2 = knots[KnotIndex + 1];
       val = K2 - K1;

src/BSplSLib/BSplSLib.cxx

@@ -570,6 +570,9 @@ static Standard_Boolean  PrepareEval (const Standard_Real            U,
         if(ip < PLowerRow)
           ip = PUpperRow;
 
+        if(ip > PUpperRow)
+          ip = PLowerRow;
+
         for (j = 0; j <= d2; j++)
           {
           const gp_Pnt& P = Poles.Value(ip,jp);