Fix to check for other.states.empty() when Merging SparseStates.
Fix to check for other.states.empty() when Merging SparseStates.

R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone