Revert "Remove the compile warning about being off the end of array"

This reverts commit 3bb663e.

This didn't work once you turn on the optimizer anyways.  It was tested on a
debug build, it cleaned up nicely, but the release build still knows we are
reading/writing off the end of the array.

mythtv/libs/libmythtv/mpeg/tspacket.h

@@ -169,8 +169,8 @@ class TSPacket : public TSHeader
     }
 
     //4.0  8 bits, iff payloadStart(), points to start of field
-    unsigned int StartOfFieldPointer() const { return *(data() + AFCOffset()); }
-    void SetStartOfFieldPointer(uint sof) { *(data() + AFCOffset()) = sof; }
+    unsigned int StartOfFieldPointer() const { return data()[AFCOffset()]; }
+    void SetStartOfFieldPointer(uint sof) { data()[AFCOffset()] = sof; }
 
     QString toString() const;