X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e34f4f195d204ca8eb94c651f8bed85e1820c368..f43bb7e246603413a43382e43e480972687eca92:/src/common/gifdecod.cpp

diff --git a/src/common/gifdecod.cpp b/src/common/gifdecod.cpp
index 011d8cf3ad..bf5280b4ef 100644
--- a/src/common/gifdecod.cpp
+++ b/src/common/gifdecod.cpp
@@ -8,7 +8,7 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma implementation "gifdecod.h"
 #endif
 
@@ -21,6 +21,7 @@
 
 #ifndef WX_PRECOMP
 #  include "wx/defs.h"
+#  include "wx/palette.h"
 #endif
 
 #if wxUSE_STREAMS && wxUSE_GIF
@@ -279,7 +280,7 @@ bool wxGIFDecoder::GoFrame(int which)
     {
         m_pimage = m_pfirst;
 
-        for (i = 1; i < which; i++)
+        for (i = 0; i < which; i++)
             m_pimage = m_pimage->next;
 
         return TRUE;
@@ -617,10 +618,12 @@ bool wxGIFDecoder::CanRead()
 {
     unsigned char buf[3];
 
-    m_f->Read(buf, 3);
-    m_f->SeekI(-3, wxFromCurrent);
+    if ( !m_f->Read(buf, WXSIZEOF(buf)) )
+        return FALSE;
+
+    m_f->SeekI(-(off_t)WXSIZEOF(buf), wxFromCurrent);
 
-    return (memcmp(buf, "GIF", 3) == 0);
+    return memcmp(buf, "GIF", WXSIZEOF(buf)) == 0;
 }