ggpo: savestate md5 wasn't computed

core/archive/rzip.h

@@ -32,6 +32,7 @@ public:
 	size_t Size() const { return size; }
 	size_t Read(void *data, size_t length);
 	size_t Write(const void *data, size_t length);
+	FILE *rawFile() const { return file; }
 
 private:
 	FILE *file = nullptr;

core/nullDC.cpp

@@ -160,6 +160,15 @@ void dc_loadstate(int index)
 	if (zipFile.Open(filename, false))
 	{
 		total_size = (u32)zipFile.Size();
+		if (index == -1 && config::GGPOEnable)
+		{
+			f = zipFile.rawFile();
+			long pos = std::ftell(f);
+			MD5Sum().add(f)
+					.getDigest(settings.network.md5.savestate);
+			std::fseek(f, pos, SEEK_SET);
+			f = nullptr;
+		}
 	}
 	else
 	{