#1 Does not compile in Delphi 2010

[Richard A. DeVenezia]

code such as:
Byte(Dest^) := fOwner.GammaTable[pByte(Longint(Src) + 2)^]; inc(Dest);

is errored:
[DCC Error] pngimage.pas(2770): E2064 Left side cannot be assigned to

[Vitaliy Grabchuk]

Delphi 2010 has built in png image support (based on this code)