Fixed Select Bugs from forum

Signed-off-by: Kiran Vasave <[email protected]>

avogadro/qtplugins/select/select.cpp

@@ -450,19 +450,23 @@ void Select::selectAtomIndex()
     // check if it's a range
     if (item.contains('-')) {
       auto range = item.split('-');
-      if (range.size() >= 2) {
+      if (range.size() == 2) {
         bool ok1, ok2;
+        int k=m_molecule->atomCount();
         int start = range.first().toInt(&ok1);
         int last = range.back().toInt(&ok2);
         if (ok1 && ok2) {
+          if(start<k)
           for (int i = start; i <= last; ++i)
             m_molecule->undoMolecule()->setAtomSelected(i, evalSelect(true, i),
                                                         undoText);
         }
       }
     } else {
       int i = item.toInt(&ok);
+      int k = m_molecule->atomCount();
       if (ok)
+        if(i<k)
         m_molecule->undoMolecule()->setAtomSelected(i, evalSelect(true, i),
                                                     undoText);
     }
@@ -576,4 +580,4 @@ void Select::createLayerFromSelection()
   rwmol->emitChanged(changes);
 }
 
-} // namespace Avogadro::QtPlugins
+} // namespace Avogadro::QtPlugins