Export missing function from libztex.
diff --git a/libztex.h b/libztex.h
index 8a506f6..f95fc99 100644
--- a/libztex.h
+++ b/libztex.h
@@ -98,5 +98,6 @@ extern int libztex_setFreq (struct libztex_device *ztex, uint16_t freq);
extern int libztex_sendHashData (struct libztex_device *ztex, unsigned char *sendbuf);
extern int libztex_readHashData (struct libztex_device *ztex, struct libztex_hash_data nonces[]);
extern int libztex_resetFpga (struct libztex_device *ztex);
+extern int libztex_selectFpga(struct libztex_device *ztex, int number);
#endif /* __LIBZTEX_H__ */