[PATCH] pppcrypt: Add headers for encrypt and setkey

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Fixes compilation with musl when building against strict C standard.
Implicit function declarations are a GNU extension.

Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
 pppd/pppcrypt.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pppd/pppcrypt.h b/pppd/pppcrypt.h
index adcdcbc..48d0d1a 100644
--- a/pppd/pppcrypt.h
+++ b/pppd/pppcrypt.h
@@ -41,6 +41,9 @@
 #include <des.h>
+#include <stdlib.h>		/* for encrypt */
+#include <unistd.h>		/* for setkey */
 extern bool	DesSetkey __P((u_char *));
 extern bool	DesEncrypt __P((u_char *, u_char *));
 extern bool	DesDecrypt __P((u_char *, u_char *));

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