Fix segfault in overlap creation due to previous merge.

The `tetraQual_toRecv` array was used without being allocated due to an erroneous merge. As the tetra quality seems to not be used after (not stored in the overlap tetra when we create it), this part of code has been deleted.

src/overlap_pmmg.c

@@ -94,8 +94,7 @@ int PMMG_create_overlap(PMMG_pParMesh parmesh, MPI_Comm comm) {
   int ntTot_in2out; // Total   tetras nbr from Pcolor_in sends    to   Pcolor_out
   int ntTot_out2in; // Total   tetras nbr on   Pcolor_in receives from Pcolor_out
 
-  /* Tetras vertices index, ref and quality to send/receive */
-  double *tetraQual_ToSend, *tetraQual_ToRecv;
+  /* Tetras vertices index and ref to send/receive */
   int *tetraVertices_ToSend;        // Indices of tetra vertices from Pcolor_in sends to Pcolor_out
   int *tetraVertices_ToRecv_inIdx;  // Indices of tetra vertices from Pcolor_out on Pcolor_in
   int *tetraVertices_ToRecv_outIdx; // Indices of tetra vertices from Pcolor_out on Pcolor_out
@@ -247,7 +246,6 @@ int PMMG_create_overlap(PMMG_pParMesh parmesh, MPI_Comm comm) {
       if ( !(pt->tag & MG_OVERLAP) ) continue;
 
       tetraRef_ToSend[ntTot_in2out]  = pt->ref;
-      tetraQual_ToSend[ntTot_in2out] = pt->qual;
 
       /* Loop over the vertices of this tetra, all the nodes belong to the overlap
          that we want to send to Pcolor_out */