Remove extra EOF check after receiving zero bytes

When we receive zero bytes, we already know that this is EOF,
an extra check can attempt to read from the socket leading to timeout on Windows

Author: slabko

contrib/poco/Net/src/HTTPChunkedStream.cpp

@@ -138,7 +138,7 @@ int HTTPChunkedStreamBuf::readChar()
 	char buffer = 0;
 	int n = _session.read(&buffer, 1);
 
-	if (n == 0 && _session.peek() == eof) {
+	if (n == 0) {
 		throw IncompleteChunkedTransfer();
 	}
 
@@ -222,7 +222,7 @@ int HTTPChunkedStreamBuf::readChunkEncodedStream(char* buffer, std::streamsize l
 
 		if (n > 0) _chunk -= n;
 
-		if (n == 0 && _session.peek() == eof) {
+		if (n == 0 && length > 0) {
 			throw IncompleteChunkedTransfer();
 		}