fix issue with version

This reverts commit 5e2e204431.

src/p2pool.cpp

@@ -997,9 +997,9 @@ void p2pool::parse_get_version_rpc(const char* data, size_t size)
 	constexpr uint64_t required = (major << 20) | minor;
 
 	if (version < required) {
-		const uint64_t version_hi = version >> 20;
+		const uint64_t version_hi = version >> 16;
 		const uint64_t version_lo = version & 65535;
-		const uint64_t required_version_hi = required >> 20;
+		const uint64_t required_version_hi = required >> 16;
 		const uint64_t required_version_lo = required & 65535;
 		LOGERR(1, "wownerod RPC v" << version_hi << '.' << version_lo << " is incompatible, update to RPC >= v" << required_version_hi << '.' << required_version_lo << " (Wownero v0.11.0.0 or newer)");
 		PANIC_STOP();