[PATCH] gdi32: Dont override FontSubstitutes on a DPI only change

[Alistair Leslie-Hughes]

When Overrideing FontSubstitute "MS Shell Dlg", it would reset
back to Tahoma on a DPI only change. Skip setting the registry
for entries that use the DPI value.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=36010

Signed-off-by: Alistair Leslie-Hughes 
---
 dlls/gdi32/font.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/gdi32/font.c b/dlls/gdi32/font.c
index 49775b7a806..c990fe5e233 100644
--- a/dlls/gdi32/font.c
+++ b/dlls/gdi32/font.c
@@ -2485,7 +2485,8 @@ static void update_codepage(void)
                 add_font_list(hkey, &nls_update_font_list[i], screen_dpi);
                 RegCloseKey(hkey);
             }
-            if (!RegCreateKeyW( HKEY_LOCAL_MACHINE,
+            /* Only update these if the Codepage changed. */
+            if (strcmp( buf, cpbuf ) && !RegCreateKeyW( HKEY_LOCAL_MACHINE,
                                 L"Software\Microsoft\Windows NT\CurrentVersion\FontSubstitutes", &hkey ))
             {
                 RegSetValueExA(hkey, "MS Shell Dlg", 0, REG_SZ, (const BYTE *)nls_update_font_list[i].shelldlg,