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wsys: pre-allocate to avoid nil dereference (thanks, Juan Cuzmar)

--- a/wsys.c

+++ b/wsys.c

@@ -100,7 +100,7 @@

 	if(snarffd < 0)

 		return nil;

-	s = nil;

+	s = emalloc(1);

 	i = 0;

 	seek(snarffd, 0, 0);

 	while((n = read(snarffd, buf, sizeof(buf))) > 0){

-- 

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