catch all exceptions and show them as unexpected errors

src/ncmpcpp.cpp

@@ -239,6 +239,10 @@ int main(int argc, char **argv)
 			{
 				Statusbar::printf("Error: %1%", e.errorMessage());
 			}
+			catch (std::exception &e)
+			{
+				Statusbar::printf("Unexpected error: %1%", e.what());
+			}
 			
 			if (myScreen == myPlaylist)
 				myPlaylist->EnableHighlighting();