Fix several warnings

libi2pd/Gzip.cpp

@@ -139,7 +139,7 @@ namespace data
 		if (m_IsDirty) deflateReset (&m_Deflator);
 		m_IsDirty = true;
 		size_t offset = 0;
-		int err;
+		int err = 0;
 		for (const auto& it: bufs)
 		{
 			m_Deflator.next_in = const_cast<uint8_t *>(it.first);

libi2pd/SSU2.cpp

@@ -918,7 +918,7 @@ namespace transport
 		}
 		uint64_t token;
 		RAND_bytes ((uint8_t *)&token, 8);
-		m_IncomingTokens.emplace (ep, std::make_pair (token, ts + SSU2_TOKEN_EXPIRATION_TIMEOUT));
+		m_IncomingTokens.emplace (ep, std::make_pair (token, uint32_t(ts + SSU2_TOKEN_EXPIRATION_TIMEOUT)));
 		return token;
 	}
 
@@ -927,7 +927,7 @@ namespace transport
 		m_IncomingTokens.erase (ep); // drop previous
 		uint64_t token;
 		RAND_bytes ((uint8_t *)&token, 8);
-		auto ret = std::make_pair (token, i2p::util::GetSecondsSinceEpoch () + SSU2_NEXT_TOKEN_EXPIRATION_TIMEOUT);
+		auto ret = std::make_pair (token, uint32_t(i2p::util::GetSecondsSinceEpoch () + SSU2_NEXT_TOKEN_EXPIRATION_TIMEOUT));
 		m_IncomingTokens.emplace (ep, ret);
 		return ret;
 	}

libi2pd/Streaming.cpp

@@ -51,8 +51,8 @@ namespace stream
 			{
 				// partially
 				rem = len - offset;
-				memcpy (buf + offset, nextBuffer->GetRemaningBuffer (), len - offset);
-				nextBuffer->offset += (len - offset);
+				memcpy (buf + offset, nextBuffer->GetRemaningBuffer (), rem);
+				nextBuffer->offset += rem;
 				offset = len; // break
 			}
 		}