Add missing return values in plugins

plugins/basecommands/execcfg.sp

@@ -90,6 +90,8 @@ public int MenuHandler_ExecCFG(Menu menu, MenuAction action, int param1, int par
 		Panel panel = view_as<Panel>(param2);
 		panel.SetTitle(title);
 	}
+
+	return 0;
 }
 
 public Action Command_ExecCfg(int client, int args)
@@ -152,15 +154,17 @@ void ParseConfigs()
 
 public SMCResult NewSection(SMCParser smc, const char[] name, bool opt_quotes)
 {
-
+	return SMCParse_Continue;
 }
 
 public SMCResult KeyValue(SMCParser smc, const char[] key, const char[] value, bool key_quotes, bool value_quotes)
 {
 	g_ConfigMenu.AddItem(key, value);
+
+	return SMCParse_Continue;
 }
 
 public SMCResult EndSection(SMCParser smc)
 {
-	
+	return SMCParse_Continue;
 }

plugins/basecommands/kick.sp

@@ -119,6 +119,8 @@ public int MenuHandler_Kick(Menu menu, MenuAction action, int param1, int param2
 			DisplayKickMenu(param1);
 		}
 	}
+
+	return 0;
 }
 
 public Action Command_Kick(int client, int args)

plugins/basecommands/map.sp

@@ -62,6 +62,8 @@ public int MenuHandler_ChangeMap(Menu menu, MenuAction action, int param1, int p
 		Panel panel = view_as<Panel>(param2);
 		panel.SetTitle(title);
 	}
+
+	return 0;
 }
 
 public void AdminMenu_Map(TopMenu topmenu, 

plugins/basecommands/who.sp

@@ -161,7 +161,10 @@ public int MenuHandler_Who(Menu menu, MenuAction action, int param1, int param2)
 		}
 		*/
 	}
+
+	return 0;
 }
+
 public Action Command_Who(int client, int args)
 {
 	bool is_admin = false;