Fix agnextmode not working as expected

- Don't allow to vote agnextmode with empty argument.
- Don't change game mode, instead just change CVar value.
- Fixed misspellings in translations.

Author: rtxa

valve/addons/amxmodx/data/lang/agmodx.txt

@@ -35,10 +35,10 @@ VOTE_ACCEPTED = Vote: %s %s^nCalled by: %s^nAccepted
 VOTE_DENIED = Vote: %s %s^nCalled by: %s^nDenied
 VOTE_RUNNING = Vote is running, type 'yes' or 'no' in console
 VOTE_DELAY =  Last vote was not accepted - %i seconds until next vote can be called
-VOTE_NOTALLOWED = Voto not allowed by server admin.
+VOTE_NOTALLOWED = Vote not allowed by server admin.
 VOTE_NOTALLOWED_GAMEMODE = Vote is not allowed in this gamemode.
 INVALID_MAP = Map is invalid
-INVALID_MODE = Mode is invalid. Type 'vote' in console to see available modes
+INVALID_MODE = Mode is invalid.
 INVALID_NUMBER = Number is invalid
 INVALID_NUMBER_MAX = Number is invalid. Max value allowed is:
 INVALID_NUMBER_MIN = Number is invalid. Min value allowed is:
@@ -88,7 +88,7 @@ VOTE_DELAY = El ultimo voto no ha sido aceptado - Faltan %i segundos para poder
 VOTE_NOTALLOWED = Voto deshabilitado por el servidor.
 VOTE_NOTALLOWED_GAMEMODE = Voto no permitido en este modo.
 INVALID_MAP = Mapa invalido
-INVALID_MODE = Modo invalido. Escriba 'vote' en consola para ver los modos disponibles
+INVALID_MODE = Modo invalido.
 INVALID_NUMBER = Numero invalido
 INVALID_NUMBER_MAX = Numero invalido. El maximo valor permitido es:
 INVALID_NUMBER_MIN = Numero invalido. El minimo valor permitido es:

valve/addons/amxmodx/scripting/agmodx.sma

@@ -2291,18 +2291,23 @@ public OnVoteAgNextMap(id, check, argc, arg1[], arg2[]) {
 }
 
 public OnVoteAgNextMode(id, check, argc, arg1[], arg2[]) {
-	if (argc != 1) {
+	if (argc != 2) {
 		client_print(id, print_console, "%l", "VOTE_INVALID");
 		return false;
 	}
 
 	if (!check) {
-		ChangeMode(arg2);
+		set_pcvar_string(gCvarGameMode, arg2);
 	} else {
 		if (!get_pcvar_num(gCvarAllowVoteGameMode)) {
 			console_print(id, "%l", "VOTE_NOTALLOWED");
 			return false;
 		}
+
+		if (!TrieKeyExists(gTrieVoteList, arg2)) {
+			client_print(id, print_console, "%l", "INVALID_MODE");
+			return false;
+		}
 	}
 
 	return true;