added C++ header guards

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1655 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/arpa/inet.h

@@ -10,6 +10,10 @@
 #include <netinet/in.h>
 #include <ByteOrder.h> /* htonl, htons, ntohl, ntohs */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 in_addr_t        inet_addr (const char *);
 int              inet_aton (const char *, struct in_addr *);
 in_addr_t        inet_lnaof (struct in_addr);
@@ -25,4 +29,8 @@ const char      *inet_ntop (int, const void *, char *, size_t);
 u_int            inet_nsap_addr (const char *, u_char *, int);
 char            *inet_nsap_ntoa (int, const u_char *, char *);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* _INET_H */

headers/posix/arpa/nameser.h

@@ -89,6 +89,10 @@
 #include <sys/types.h>
 #include <endian.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * revision information.  this is the release date in YYYYMMDD format.
  * it can change every day so the right thing to do with it is use it
@@ -359,4 +363,8 @@ extern	uint32	_getlong  (const u_char *);
 	(cp) += INT32SZ; \
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* !_NAMESER_H_ */