exchange XSaveWorkaround (which was fixed in VS2015) for ucrtFreadWorkaround (which was broken in VS2015).

Source/Core/Common/ucrtFreadWorkaround.cpp

@@ -0,0 +1,85 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#if defined(_WIN32)
+
+#include "CommonTypes.h"
+#include <Windows.h>
+
+struct PatchInfo {
+	const wchar_t *module_name;
+	u32 checksum;
+	u32 rva;
+	u32 length;
+} static const s_patches[] = {
+	{ L"ucrtbase.dll", 0xF61ED, 0x6AE7B, 5 },
+	{ L"ucrtbased.dll", 0x1C1915 , 0x91905, 5 },
+};
+
+bool ApplyPatch(const PatchInfo &patch) {
+	auto module = GetModuleHandleW(patch.module_name);
+	if (module == nullptr)
+	{
+		return false;
+	}
+
+	auto ucrtbase_pe = (PIMAGE_NT_HEADERS)((uintptr_t)module + ((PIMAGE_DOS_HEADER)module)->e_lfanew);
+	if (ucrtbase_pe->OptionalHeader.CheckSum != patch.checksum) {
+		return false;
+	}
+
+	void *patch_addr = (void *)((uintptr_t)module + patch.rva);
+	size_t patch_size = patch.length;
+
+	DWORD old_protect;
+	if (!VirtualProtect(patch_addr, patch_size, PAGE_EXECUTE_READWRITE, &old_protect))
+	{
+		return false;
+	}
+
+	memset(patch_addr, 0x90, patch_size);
+
+	VirtualProtect(patch_addr, patch_size, old_protect, &old_protect);
+
+	FlushInstructionCache(GetCurrentProcess(), patch_addr, patch_size);
+
+	return true;
+}
+
+int __cdecl EnableucrtFreadWorkaround()
+{
+	// This patches ucrtbase such that fseek will always
+	// synchronize the file object's internal buffer.
+
+	bool applied_at_least_one = false;
+	for (const auto &patch : s_patches) {
+		if (ApplyPatch(patch)) {
+			applied_at_least_one = true;
+		}
+	}
+
+	/* For forward compat, do not fail if patches don't apply (e.g. version mismatch)
+	if (!applied_at_least_one) {
+		std::abort();
+	}
+	//*/
+
+	return 0;
+}
+
+// Create a segment which is recognized by the linker to be part of the CRT
+// initialization. XI* = C startup, XC* = C++ startup. "A" placement is reserved
+// for system use. Thus, the earliest we can get is XIB (C startup is before
+// C++).
+#pragma section(".CRT$XIB", read)
+
+// Place a symbol in the special segment, make it have C linkage so that
+// referencing it doesn't require ugly decorated names.
+// Use /include:EnableucrtFreadWorkaround linker flag to enable this.
+extern "C" {
+	__declspec(allocate(".CRT$XIB"))
+	decltype(&EnableucrtFreadWorkaround) ucrtFreadWorkaround = EnableucrtFreadWorkaround;
+};
+
+#endif