[PATCH] gdiplus: Fix a possible NULL pointer reference in GdipGetNearestColor().

[Zhiyi Zhang]

Fix a regression from 5ca9da2c0197ac1260975c1b7b643dbd11185715

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=48657
Signed-off-by: Zhiyi Zhang 
---
 dlls/gdiplus/graphics.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index e8606f6b60..af95c7aeea 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -4783,7 +4783,7 @@ GpStatus WINGDIPAPI GdipGetNearestColor(GpGraphics *graphics, ARGB* argb)
     if(graphics->busy)
         return ObjectBusy;

-    if (graphics->image->type == ImageTypeBitmap)
+    if (graphics->image && graphics->image->type == ImageTypeBitmap)
     {
         static int once;
         GpBitmap *bitmap = (GpBitmap *)graphics->image;