fixed a bug with only 1 selection (may be not)

diff --git a/src/spacetimecorr.cpp b/src/spacetimecorr.cpp
index c3f1ec00ec4670f1291dc3e2b6f63e29360b74b9..c5bea4d98a90bd2d3f393b2c9296abd51d08d25e 100644 (file)
--- a/src/spacetimecorr.cpp
+++ b/src/spacetimecorr.cpp
@@ -268,7 +268,10 @@ Domains::initAfterFirstFrame(const TrajectoryAnalysisSettings       &settings,
         trajectory.back()[i] = fr.x[index[i]];
     }
     domains.resize(sel_.size());
-    for (int i = 1; i < sel_.size(); i++) {
+    for (int i = 0; i < sel_.size(); i++) {
+        if (sel_.size() == 1) {
+            continue;
+        }
         atomind  = sel_[i].atomIndices();
         for (ConstArrayRef<int>::iterator ai = atomind.begin(); (ai < atomind.end()); ai++) {
             domains[i].push_back(*ai);