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-rw-r--r--libvncclient/rfbproto.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libvncclient/rfbproto.c b/libvncclient/rfbproto.c
index 721c3ae..e2a583c 100644
--- a/libvncclient/rfbproto.c
+++ b/libvncclient/rfbproto.c
@@ -167,6 +167,10 @@ static void FillRectangle(rfbClient* client, int x, int y, int w, int h, uint32_
static void CopyRectangle(rfbClient* client, uint8_t* buffer, int x, int y, int w, int h) {
int j;
+ if (client->frameBuffer == NULL) {
+ return;
+ }
+
#define COPY_RECT(BPP) \
{ \
int rs = w * BPP / 8, rs2 = client->width * BPP / 8; \