Do not start prompt with the current search constraint when applying a new one

NEWS

@@ -3,6 +3,7 @@ ncmpcpp-0.8.1 (????-??-??)
 * Using '--quiet' command line argument no longer results in a crash.
 * If songs in media library have no track numbers, sort them by their display format.
 * Fixed a situation in which songs added to playlist from media library or playlist editor screens would not be immediately marked as such.
+* Do not start prompt with the current search constraint when applying a new one.
 
 ncmpcpp-0.8 (2017-05-21)
 * Configuration variable 'execute_on_player_state_change' was added.

src/actions.cpp

@@ -3020,7 +3020,7 @@ void findItem(const SearchDirection direction)
 	assert(w != nullptr);
 	assert(w->allowsSearching());
 	
-	std::string constraint = w->searchConstraint();
+	std::string constraint;
 	try
 	{
 		ScopedValue<bool> disabled_autocenter_mode(Config.autocenter_mode, false);