SICS-776 Close the anti-collider file

site_ansto/instrument/config/anticollider/anticollider_common.tcl

@@ -45,6 +45,7 @@ proc handle_acscript_exception {status message args} {
 proc ::anticollider::loadscript {args} {
   variable veto_rules
 
+  catch {
     set fh [open $::cfPath(anticollider)/[lindex $args 0] RDONLY ]
     while {[gets $fh line] >= 0} {
       # Skip empty lines and comments
@@ -54,6 +55,10 @@ proc ::anticollider::loadscript {args} {
       lappend veto_rules $line
     }
   }
+  catch {
+    close $fh
+  }
+}
 
 ##
 # @brief Compile compile an anticollider declaration into a veto region table