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	Fix app_chanisavail if there are invalid arguments (bug #1130)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2277 65c4cc65-6c06-0410-ace0-fbb531ad65f3
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		@@ -76,8 +76,8 @@ static int chanavail_exec(struct ast_channel *chan, void *data)
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			tech = cur;
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			number = strchr(tech, '/');
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			if (!number) {
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				ast_log(LOG_WARNING, "ChanIsAvail argument takes format (Zap/[device])\n");
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				continue;
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				ast_log(LOG_WARNING, "ChanIsAvail argument takes format ([technology]/[device])\n");
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				return -1;
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			}
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			*number = '\0';
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			number++;
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