Update recorder.cpp (#1011)

* Update recorder.cpp

* Update recorder.cpp

* Update version.sh

build-aux/version.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # This file is used by autoconf to generate the version string.
 # It is assumed that this script is run from the top-level srcdir.
 EXE=$0

module/tape/recorder.cpp

@@ -113,6 +113,13 @@ static int recorder_open(OBJECT *obj)
 		gl_error("invalid interval value (%d)", my->interval);
 		return 0;
 	}
+	char buffer[1024];
+	int minimum_timestep = atoi(gl_global_getvar("minimum_timestep",buffer,sizeof(buffer)-1));
+	if ( minimum_timestep > 0 && my->interval > 0 && my->interval < minimum_timestep )
+	{
+		gl_warning("%s <recorder:%d> interval %d is less than minimum timestep, setting interval to %d", obj->name?obj->name:"(unnamed)", obj->id, my->interval, minimum_timestep);
+		my->interval = minimum_timestep;
+	}
 
 	/* if no filename given */
 	if (strcmp(my->file,"")==0)