Fix write ability flags of PSD files (#1260)

src/image.cpp

@@ -1,6 +1,6 @@
 // ***************************************************************** -*- C++ -*-
 /*
- * Copyright (C) 2004-2018 Exiv2 authors
+ * Copyright (C) 2004-2020 Exiv2 authors
  * This program is part of the Exiv2 distribution.
  *
  * This program is free software; you can redistribute it and/or
@@ -129,7 +129,7 @@ namespace {
         { ImageType::eps,  newEpsInstance,  isEpsType,  amNone,      amNone,      amReadWrite, amNone      },
         { ImageType::xmp,  newXmpInstance,  isXmpType,  amReadWrite, amReadWrite, amReadWrite, amNone      },
         { ImageType::gif,  newGifInstance,  isGifType,  amNone,      amNone,      amNone,      amNone      },
-        { ImageType::psd,  newPsdInstance,  isPsdType,  amRead,      amRead,      amRead,      amNone      },
+        { ImageType::psd,  newPsdInstance,  isPsdType,  amReadWrite, amReadWrite, amReadWrite, amNone      },
         { ImageType::tga,  newTgaInstance,  isTgaType,  amNone,      amNone,      amNone,      amNone      },
         { ImageType::bmp,  newBmpInstance,  isBmpType,  amNone,      amNone,      amNone,      amNone      },
         { ImageType::jp2,  newJp2Instance,  isJp2Type,  amReadWrite, amReadWrite, amReadWrite, amNone      },