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devshr: fixed crash

--- a/sys/src/9/port/devshr.c

+++ b/sys/src/9/port/devshr.c

@@ -574,8 +574,8 @@

 			*p = 0;

 	} else

 		desc = "";

-	aname = strchr(buf, '\n') + 1;

-	if(aname != nil && *aname == 0)

+	aname = strchr(buf, '\n');

+	if(aname != nil && *++aname == 0)

 		aname = nil;

 	if(strlen(desc) > 128)

 		error(Ebadarg);

-- 

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