search engine: fix error occuring while trying to select first album in results

src/menu.h

@@ -279,6 +279,12 @@ namespace NCurses
 			///
 			bool isStatic(int pos = -1) const;
 			
+			/// Checks whether given position is separator
+			/// @param pos position to be checked, -1 checks currently highlighted position
+			/// @return true if position is separator, false otherwise
+			///
+			bool isSeparator(int pos = -1) const;
+			
 			/// Selects/deselects given position
 			/// @param pos position in list
 			/// @param state state of selection
@@ -956,6 +962,12 @@ template <typename T> bool NCurses::Menu<T>::isStatic(int pos) const
 	return (*itsOptionsPtr)[pos]->isStatic;
 }
 
+template <typename T> bool NCurses::Menu<T>::isSeparator(int pos) const
+{
+	pos = pos == -1 ? itsHighlight : pos;
+	return !itsOptionsPtr->at(pos);
+}
+
 template <typename T> bool NCurses::Menu<T>::hasSelected() const
 {
 	for (option_const_iterator it = itsOptionsPtr->begin(); it != itsOptionsPtr->end(); ++it)

src/search_engine.h

@@ -38,7 +38,7 @@ class SearchEngine : public Screen< Menu< std::pair<Buffer *, MPD::Song *> > >
 		virtual bool isTabbable() { return true; }
 		
 		virtual MPD::Song *CurrentSong();
-		virtual MPD::Song *GetSong(size_t pos) { return w->at(pos).second; }
+		virtual MPD::Song *GetSong(size_t pos) { return !w->isSeparator(pos) ? w->at(pos).second : 0; }
 		
 		virtual bool allowsSelection() { return w->Choice() >= StaticOptions; }
 		virtual void ReverseSelection() { w->ReverseSelection(StaticOptions); }