Merged revisions 277327 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r277327 | mnicholson | 2010-07-16 13:30:22 -0500 (Fri, 16 Jul 2010) | 8 lines
  
  Interpret device state AST_DEVICE_UNKNOWN as extension state AST_EXTENSION_NOT_INUSE.
  
  (closes issue #16035)
  Reported by: francesco_r
  Patches:
        pbx.c.patch uploaded by viniciusfontes (license 978)
  Tested by: francesco_r, agx, lawbar
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@277331 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/pbx.c

@@ -4133,8 +4133,9 @@ enum ast_extension_states ast_devstate_to_extenstate(enum ast_device_state devst
 		return AST_EXTENSION_ONHOLD;
 	case AST_DEVICE_BUSY:
 		return AST_EXTENSION_BUSY;
-	case AST_DEVICE_UNAVAILABLE:
 	case AST_DEVICE_UNKNOWN:
+		return AST_EXTENSION_NOT_INUSE;
+	case AST_DEVICE_UNAVAILABLE:
 	case AST_DEVICE_INVALID:
 		return AST_EXTENSION_UNAVAILABLE;
 	case AST_DEVICE_RINGINUSE: