fix the support of PDF with CCITTFaxDecode

Failed to read PDF with CCITTFaxDecode in case the "DecodeParms" specifies as Array.
for example:
```
<</Type/XObject
/Subtype/Image
/Width 1664
/Height 2278
/BitsPerComponent 1
/ColorSpace/DeviceGray
/Filter[/CCITTFaxDecode]
/DecodeParms[<</Columns 1664/Rows 2278/K -1 /BlackIs1 false>>]
/Length 260290
>>
stream
```