libbb: nonblock_safe_read->nonblock_immune_read, remove unused param of xmalloc_reads

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/editors/patch.c b/editors/patch.c
index a90252a..6d3f319 100644
--- a/editors/patch.c
+++ b/editors/patch.c
@@ -239,7 +239,7 @@
 	plist = TT.current_hunk;
 	buf = NULL;
 	if (reverse ? TT.oldlen : TT.newlen) for (;;) {
-		char *data = xmalloc_reads(TT.filein, NULL, NULL);
+		char *data = xmalloc_reads(TT.filein, NULL);
 
 		TT.linenum++;