Alexandre Julliard : user32: Ignore PNG icons instead of failing if we don 't have libpng.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9dc886244bcc21468c88f4951bb875155c0df242
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=9dc886244bcc21468c88f4951bb875155c0df242

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Tue Apr  3 20:41:58 2018 +0200

user32: Ignore PNG icons instead of failing if we don't have libpng.

Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/user32/cursoricon.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/dlls/user32/cursoricon.c b/dlls/user32/cursoricon.c
index 7730736..a6daa48 100644
--- a/dlls/user32/cursoricon.c
+++ b/dlls/user32/cursoricon.c
@@ -409,6 +409,13 @@ static BITMAPINFO *load_png(const char *png_data, DWORD *size)
 
 #else /* SONAME_LIBPNG */
 
+static BOOL have_libpng(void)
+{
+    static int warned;
+    if (!warned++) WARN( "PNG support not compiled in\n" );
+    return FALSE;
+}
+
 static BOOL get_png_info(const void *png_data, DWORD size, int *width, int *height, int *bpp)
 {
     return FALSE;
@@ -997,7 +1004,11 @@ static BOOL CURSORICON_GetFileEntry( LPCVOID dir, DWORD size, int n,
     info = (const BITMAPINFOHEADER *)((const char *)dir + entry->dwDIBOffset);
 
     if (info->biSize == PNG_SIGN)
-        return get_png_info(info, size, width, height, bits);
+    {
+        if (have_libpng()) return get_png_info(info, size, width, height, bits);
+        *width = *height = *bits = 0;
+        return TRUE;
+    }
 
     if (info->biSize != sizeof(BITMAPCOREHEADER))
     {