LF: rework internal APIs

client/src/cmdlfguard.h

@@ -13,6 +13,6 @@
 
 int CmdLFGuard(const char *Cmd);
 int detectGProxII(uint8_t *bits, size_t *size);
-int demodGuard(void);
+int demodGuard(bool verbose);
 int getGuardBits(uint8_t fmtlen, uint32_t fc, uint32_t cn, uint8_t *guardBits);
 #endif