UTMT throws a warning when you open data.win

[Senjay-id]

Describe the bug

datawin.zip I've exported a almost empty Data.win from gamemaker, then UTMT throws a warning when you open the data.win that i made. Warning - the estimated object pool size differs from the actual size please report this on UMT Github.

Reproducing steps

1. Open gamemaker, make a placeholder sprite.
2. Right Click the sprite then assign to texture group. choose the default
3. Hover to the tools tab and click on Texture Group
4. Change the Texture Group type to Dynamic. Also change the Texture Group Format to PNG
5. Export the game then open the data.win in UMT, throws a warning: object pool size differs from actual size

Setup Details

1. The automatically updating UMT Bleeding Edge Commit Number : 3e9675
2. Windows 10 OS
3. n/a

[Jacky720]

Tightly related to #1684-- the object pool estimation code just doesn't know what to do with external assets.

[Miepee]

Gonna mark this as a duplicate of #1684