fixing couple of small memory leaks

src/common/cvar.c

@@ -585,3 +585,24 @@ Cvar_Init(void)
 	Cmd_AddCommand("cvarlist", Cvar_List_f);
 }
 
+/*
+ * Free list of cvars
+ */
+void
+Cvar_Fini(void)
+{
+	cvar_t *var;
+
+	for (var = cvar_vars; var;)
+	{
+		cvar_t *c = var;
+		Z_Free(var->string);
+		Z_Free(var->name);
+		Z_Free(var);
+		var = c->next;
+	}
+
+	Cmd_RemoveCommand("cvarlist");
+	Cmd_RemoveCommand("set");
+}
+

src/common/header/common.h

@@ -475,6 +475,8 @@ void Cvar_WriteVariables(char *path);
 
 void Cvar_Init(void);
 
+void Cvar_Fini(void);
+
 char *Cvar_Userinfo(void);
 
 /* returns an info string containing all the CVAR_USERINFO cvars */

src/common/misc.c

@@ -411,5 +411,6 @@ Qcommon_Frame(int msec)
 void
 Qcommon_Shutdown(void)
 {
+	Cvar_Fini();
 }