don't crash in UnselectAll() if the tree has no root

[wxWidgets.git] / src / common / gifdecod.cpp

diff --git a/src/common/gifdecod.cpp b/src/common/gifdecod.cpp
index ffd45bc87e6e06cf625dbfd251bb183c15f2ff7f..1cd7e9f82752f81c9c950693162ccf155d8a0a83 100644 (file)
--- a/src/common/gifdecod.cpp
+++ b/src/common/gifdecod.cpp
@@ -653,6 +653,9 @@ int wxGIFDecoder::ReadGIF()
     /* try to read to the end of the stream */
     while (type != 0x3B)
     {
+        if (!m_f->IsOk())
+            return wxGIF_TRUNCATED;
+            
         type = (unsigned char)m_f->GetC();
 
         if (type == 0x21)