ntdll: SzCSDVersion is an empty string on Windows 8 and up.

dlls/kernel32/tests/version.c

@@ -156,6 +156,9 @@ static void test_GetVersionEx(void)
     ok(ret ||
        broken(ret == 0), /* win95 */
        "Expected GetVersionExA to succeed\n");
+
+    if (!infoExA.wServicePackMajor && !infoExA.wServicePackMinor)
+        ok(!infoExA.szCSDVersion[0], "got '%s'\n", infoExA.szCSDVersion);
 }
 
 static void test_VerifyVersionInfo(void)

dlls/ntdll/version.c

@@ -176,20 +176,17 @@ static const RTL_OSVERSIONINFOEXW VersionData[NB_WINDOWS_VERSIONS] =
     /* WIN8 */
     {
         sizeof(RTL_OSVERSIONINFOEXW), 6, 2, 0x23F0, VER_PLATFORM_WIN32_NT,
-        {' ',0},
-        0, 0, VER_SUITE_SINGLEUSERTS, VER_NT_WORKSTATION, 0
+        {0}, 0, 0, VER_SUITE_SINGLEUSERTS, VER_NT_WORKSTATION, 0
     },
     /* WIN81 */
     {
         sizeof(RTL_OSVERSIONINFOEXW), 6, 3, 0x2580, VER_PLATFORM_WIN32_NT,
-        {' ',0},
-        0, 0, VER_SUITE_SINGLEUSERTS, VER_NT_WORKSTATION, 0
+        {0}, 0, 0, VER_SUITE_SINGLEUSERTS, VER_NT_WORKSTATION, 0
     },
     /* WIN10 */
     {
         sizeof(RTL_OSVERSIONINFOEXW), 10, 0, 0x3839, VER_PLATFORM_WIN32_NT,
-        {' ',0},
-        0, 0, VER_SUITE_SINGLEUSERTS, VER_NT_WORKSTATION, 0
+        {0}, 0, 0, VER_SUITE_SINGLEUSERTS, VER_NT_WORKSTATION, 0
     },
 
 };

programs/winecfg/appdefaults.c

@@ -48,9 +48,9 @@ static const struct
     const char *szProductType;
 } win_versions[] =
 {
-    { "win10",       "Windows 10",       10,  0, 0x3839,VER_PLATFORM_WIN32_NT, " ", 0, 0, "WinNT"},
-    { "win81",       "Windows 8.1",       6,  3, 0x2580,VER_PLATFORM_WIN32_NT, " ", 0, 0, "WinNT"},
-    { "win8",        "Windows 8",         6,  2, 0x23F0,VER_PLATFORM_WIN32_NT, " ", 0, 0, "WinNT"},
+    { "win10",       "Windows 10",       10,  0, 0x3839,VER_PLATFORM_WIN32_NT, "", 0, 0, "WinNT"},
+    { "win81",       "Windows 8.1",       6,  3, 0x2580,VER_PLATFORM_WIN32_NT, "", 0, 0, "WinNT"},
+    { "win8",        "Windows 8",         6,  2, 0x23F0,VER_PLATFORM_WIN32_NT, "", 0, 0, "WinNT"},
     { "win2008r2",   "Windows 2008 R2",   6,  1, 0x1DB1,VER_PLATFORM_WIN32_NT, "Service Pack 1", 1, 0, "ServerNT"},
     { "win7",        "Windows 7",         6,  1, 0x1DB1,VER_PLATFORM_WIN32_NT, "Service Pack 1", 1, 0, "WinNT"},
     { "win2008",     "Windows 2008",      6,  0, 0x1772,VER_PLATFORM_WIN32_NT, "Service Pack 2", 2, 0, "ServerNT"},