added a texMissing clause to findcells in libvol2bird.c --was lost during refactoring; changed the return code on error from 0 to -1;
added a texMissing clause to findcells in libvol2bird.c --was lost during refactoring; changed the return code on error from 0 to -1;

NLeSC/enram,NLeSC/enram,NLeSC/enram,NLeSC/enram