bug 2810 once a latched cvar was changed it could not be reset to its original value

code/qcommon/cvar.c

@@ -331,7 +331,11 @@ cvar_t *Cvar_Set2( const char *var_name, const char *value, qboolean force ) {
 		value = var->resetString;
 	}
 
-	if (!strcmp(value,var->string)) {
+	if((var->flags & CVAR_LATCH) && var->latchedString) {
+		if(!strcmp(value,var->latchedString))
+			return var;
+	}
+	else if (!strcmp(value,var->string)) {
 		return var;
 	}
 	// note what types of cvars have been modified (userinfo, archive, serverinfo, systeminfo)