if toleranceEdgeLength==0 and curve is zero-length, force N=1

JF - we should really clean up the degenerated cases

Mesh/meshGEdge.cpp

@@ -286,18 +286,18 @@ void meshGEdge::operator() (GEdge *ge)
   ge->setLength(length);
   Points.clear();
 
-  if(length == 0. && CTX::instance()->mesh.toleranceEdgeLength == 0.)
-    Msg::Error("Curve %d has a zero length", ge->tag());
-  else if (length == 0.)
-    Msg::Debug("Curve %d has a zero length", ge->tag());
-
   if(length < CTX::instance()->mesh.toleranceEdgeLength)
     ge->setTooSmall(true);
 
   // Integrate detJ/lc du 
   double a;
   int N;
-  if (ge->degenerate(0)){
+  if(length == 0. && CTX::instance()->mesh.toleranceEdgeLength == 0.){
+    Msg::Error("Curve %d has a zero length", ge->tag());
+    a = 0;
+    N = 1;
+  }
+  else if(ge->degenerate(0)){
     a = 0.;
     N = 1;
   }