Show pool-side hashrate in status only when it's not zero

src/log.h

@@ -299,15 +299,21 @@ template<> struct log::Stream::Entry<std::string>
 
 struct Hashrate
 {
-	explicit FORCEINLINE Hashrate(uint64_t data) : m_data(data) {}
+	FORCEINLINE Hashrate() : m_data(0), m_valid(false) {}
+	explicit FORCEINLINE Hashrate(uint64_t data) : m_data(data), m_valid(true) {}
 
 	uint64_t m_data;
+	bool m_valid;
 };
 
 template<> struct log::Stream::Entry<Hashrate>
 {
 	static NOINLINE void put(Hashrate&& value, Stream* wrapper)
 	{
+		if (!value.m_valid) {
+			return;
+		}
+
 		const double x = static_cast<double>(value.m_data);
 
 		static constexpr const char* units[] = { "H/s", "KH/s", "MH/s", "GH/s", "TH/s", "PH/s", "EH/s" };

src/side_chain.cpp

@@ -651,7 +651,7 @@ void SideChain::print_status()
 		"\nMain chain hashrate       = " << log::Hashrate(network_hashrate) <<
 		"\nSide chain height         = " << tip_height + 1 <<
 		"\nSide chain hashrate       = " << log::Hashrate(pool_hashrate) <<
-		"\nYour hashrate (pool-side) = " << log::Hashrate(hashrate_est) <<
+		(hashrate_est ? "\nYour hashrate (pool-side) = " : "") << (hashrate_est ? log::Hashrate(hashrate_est) : log::Hashrate()) <<
 		"\nPPLNS window              = " << total_blocks_in_window << " blocks (+" << total_uncles_in_window << " uncles, " << total_orphans << " orphans)"
 		"\nYour shares               = " << our_blocks_in_window << " blocks (+" << our_uncles_in_window << " uncles, " << our_orphans << " orphans)"
 		"\nBlock reward share (est)  = " << log::XMRAmount(reward_share)