[Parser] Links inside galleries are parsed as internal

[tgalery]

Looking here https://en.wikipedia.org/wiki/Jordan_Staircase_of_the_Winter_Palace it seems that the links inside the markup are capture as type INTERNAL instead of IMAGE , the markup of the page looks like:

==Gallery==
<gallery heights="150" widths="150">
Jordantreppe Petersburg Eremitage 02.JPG
The State (Jordan, or Ambassadors') Staircase.jpg
The State (Jordan, or Ambassadors') Staircase 2.jpg
Hermitage St. Petersburg Interior 20021009.jpg
Hermitage staicase.jpg
Jordantreppe Decke Petersburg Eremitage.jpg
RIAN archive 139402 Main Staircase at the Hermitage.jpg
Jordan Staircase 9.JPG
</gallery>

[mawiesne]

@tgalery How can we provide a test case for this scenario?