Add some checks in ms_* to make sure memoserv really exists

modules/commands/ms_cancel.cpp

@@ -25,6 +25,9 @@ class CommandMSCancel : public Command
 
 	void Execute(CommandSource &source, const std::vector<Anope::string> &params)
 	{
+		if (!memoserv)
+			return;
+
 		User *u = source.u;
 
 		const Anope::string &nname = params[0];

modules/commands/ms_ignore.cpp

@@ -25,6 +25,9 @@ class CommandMSIgnore : public Command
 
 	void Execute(CommandSource &source, const std::vector<Anope::string> &params)
 	{
+		if (!memoserv)
+			return;
+
 		User *u = source.u;
 
 		Anope::string channel = params[0];

modules/commands/ms_rsend.cpp

@@ -25,6 +25,9 @@ class CommandMSRSend : public Command
 
 	void Execute(CommandSource &source, const std::vector<Anope::string> &params)
 	{
+		if (!memoserv)
+			return;
+
 		User *u = source.u;
 
 		const Anope::string &nick = params[0];

modules/commands/ms_send.cpp

@@ -25,6 +25,9 @@ class CommandMSSend : public Command
 
 	void Execute(CommandSource &source, const std::vector<Anope::string> &params)
 	{
+		if (!memoserv)
+			return;
+
 		const Anope::string &nick = params[0];
 		const Anope::string &text = params[1];
 

modules/commands/ms_sendall.cpp

@@ -25,6 +25,9 @@ class CommandMSSendAll : public Command
 
 	void Execute(CommandSource &source, const std::vector<Anope::string> &params)
 	{
+		if (!memoserv)
+			return;
+
 		User *u = source.u;
 		const Anope::string &text = params[0];
 

modules/commands/ms_staff.cpp

@@ -25,6 +25,9 @@ class CommandMSStaff : public Command
 
 	void Execute(CommandSource &source, const std::vector<Anope::string> &params)
 	{
+		if (!memoserv)
+			return;
+
 		const Anope::string &text = params[0];
 
 		if (readonly)