Fixed a POC calculation error in some corner cases. (#145)

* * rocDecode/HEVC: Fixed a POC calculation error in some corner cases.

* * rocDecode/HEVC: Added a newline between two functions. No functional changes.

[ROCm/rocdecode commit: 1cdbac7d70]

projects/rocdecode/src/parser/hevc_parser.h

@@ -947,4 +947,6 @@ private:
     bool IsBlaPic(NalUnitHeader *nal_header_ptr);
     bool IsIrapPic(NalUnitHeader *nal_header_ptr);
     bool IsRaslPic(NalUnitHeader *nal_header_ptr);
+    bool IsRadlPic(NalUnitHeader *nal_header_ptr);
+    bool IsRefPic(NalUnitHeader *nal_header_ptr);
 };