Catch or declare forgotten errors

This fixes some compile time warnings.

src/database/database-uri-iterator.vala

@@ -5,11 +5,16 @@ private class Games.DatabaseUriIterator : Object, UriIterator {
 		SELECT uri FROM game_resources;
 	""";
 
-	private Sqlite.Statement statement;
+	private Sqlite.Statement? statement;
 	private Uri? uri;
 
 	internal DatabaseUriIterator (Sqlite.Database database) {
-		statement = Database.prepare (database, SELECT_GAME_RESOURCE_QUERY);
+		try {
+			statement = Database.prepare (database, SELECT_GAME_RESOURCE_QUERY);
+		}
+		catch (Error e) {
+			debug (e.message);
+		}
 	}
 
 	public new Uri? get () {
@@ -17,6 +22,9 @@ private class Games.DatabaseUriIterator : Object, UriIterator {
 	}
 
 	public bool next () {
+		if (statement == null)
+			return false;
+
 		if (statement.step () != Sqlite.ROW)
 			return false;
 

src/database/database.vala

@@ -37,7 +37,7 @@ private class Games.Database : Object {
 			throw new DatabaseError.EXECUTION_FAILED ("Execution failed.");
 	}
 
-	public bool has_uri (Uri uri) {
+	public bool has_uri (Uri uri) throws Error {
 		var statement = prepare (database, HAS_URI_QUERY);
 
 		bind_text (statement, "$URI", uri.to_string ());

src/retro/retro-runner.vala

@@ -313,7 +313,14 @@ public class Games.RetroRunner : Object, Runner {
 		if (!is_initialized)
 			return;
 
-		core.set_current_media (media_set.selected_media_number);
+		try {
+			core.set_current_media (media_set.selected_media_number);
+		}
+		catch (Error e) {
+			debug (e.message);
+
+			return;
+		}
 
 		var media_number = media_set.selected_media_number;
 
@@ -331,9 +338,14 @@ public class Games.RetroRunner : Object, Runner {
 		if (uris.length == 0)
 			return;
 
-		var uri = uris[0];
+		try {
+			core.set_current_media (media_set.selected_media_number);
+		}
+		catch (Error e) {
+			debug (e.message);
 
-		core.set_current_media (media_set.selected_media_number);
+			return;
+		}
 
 		try {
 			save_media_data ();

src/ui/application.vala

@@ -279,8 +279,14 @@ public class Games.Application : Gtk.Application {
 	}
 
 	private async void add_cached_uri (Uri uri) {
-		if (database != null)
-			database.add_uri (uri);
+		try {
+			if (database != null)
+					database.add_uri (uri);
+		}
+		catch (Error e) {
+			debug (e.message);
+		}
+
 		yield game_collection.add_uri (uri);
 	}