diff --git a/mapper.cpp b/mapper.cpp index eeeeca5..e95da83 100644 --- a/mapper.cpp +++ b/mapper.cpp @@ -676,7 +676,7 @@ int main(int argc, char *argv[]) if (!foundGeometrySpec) generator.setBlockGeometry(true); } - else { + else if (optarg && *optarg) { for (char *c = optarg; *c; c++) if (*c == ',') *c = ' '; istringstream iss;