fix regression in periodic lines (missing abs())

Geo/GModelIO_GEO.cpp

@@ -314,7 +314,8 @@ int GModel::importGEOInternals()
         add(f);
       }
       else{
-        if(s->Typ == MSH_SURF_PLAN) f->computeMeanPlane(); // recompute in case geom has changed
+        if(s->Typ == MSH_SURF_PLAN)
+          f->computeMeanPlane(); // recompute in case geom has changed
         f->resetMeshAttributes();
       }
       if(!s->Visible) f->setVisibility(0);
@@ -387,7 +388,7 @@ int GModel::importGEOInternals()
     int iTarget = peIter->first;
     GEO_Internals::MasterEdge& me = peIter->second;
     int iSource = me.tag;
-    GEdge* target = getEdgeByTag(iTarget);
+    GEdge* target = getEdgeByTag(abs(iTarget));
     GEdge* source = getEdgeByTag(abs(iSource));
     if(!target)
       Msg::Error("Unknown target line for periodic connection from %d to %d",
@@ -395,11 +396,13 @@ int GModel::importGEOInternals()
     if(!source)
       Msg::Error("Unknown source line for periodic connection from %d to %d",
                  iTarget, iSource);
+    if(target && source){
       if(me.affineTransform.size() == 16)
         target->setMeshMaster(source, me.affineTransform);
       else
         target->setMeshMaster(source, me.tag > 0 ? 1 : -1);
     }
+  }
 
   std::map<int,GEO_Internals::MasterFace>::iterator pfIter =
     _geo_internals->periodicFaces.begin();
@@ -415,11 +418,13 @@ int GModel::importGEOInternals()
     if(!source)
       Msg::Error("Unknown source surface for periodic connection from %d to %d",
                  iTarget, iSource);
+    if(target && source){
       if(mf.affineTransform.size() == 16)
         target->setMeshMaster(source,mf.affineTransform);
       else
         target->setMeshMaster(source,mf.edgeCounterparts);
     }
+  }
 
   Msg::Debug("Gmsh model (GModel) imported:");
   Msg::Debug("%d Vertices", vertices.size());

doc/VERSIONS.txt

-2.13.0: new ONELAB 1.2 protocol with suppport for lists; new boundary recovery
-code; better adaptive visualization of quads and hexahedra; minor fixes.
+2.13.0: new ONELAB 1.2 protocol with native support for lists; new 3D boundary
+recovery code; better adaptive visualization of quads and hexahedra; minor
+fixes.
 
 2.12.0 (March 5, 2016): improved interactive definition of physical groups and
 handling of ONELAB clients; improved full quad algorithm; added support for list