findSideFaces(): Generate initial 'ijk' that was (probably) intended.

The trick of eliding explicit initialisers can only be use to zero an
array (or structure), not to copy an arbitrary initialiser to all
elements of the array.

opm/core/pressure/FlowBCManager.cpp

@@ -197,7 +197,7 @@ namespace Opm
 	    // min/max i/j/k (depending on side).
 	    const int correct_ijk = (side % 2) ? grid.cartdims[side/2] : 0;
 	    for (int c = 0; c < grid.number_of_cells; ++c) {
-		int ijk[3] = { -1 };
+		int ijk[3] = { -1, -1, -1 };
 		cartCoord(grid.global_cell[c], grid.cartdims, ijk);
 		if (ijk[side/2] != correct_ijk) {
 		    continue;