Fix image.h guard

[supcik]

The image.h file has the same guard as pixel.h, so image.h does not get included.

Note : I also had to increase the stack size to use the function hagl_load_image. Perhaps a note in the documentation could be useful.

[tuupola]

Good catch. Thanks!

Note : I also had to increase the stack size to use the function hagl_load_image

With ESP32?

[supcik]

With ESP32?

Yes, with ESP32 and ESP/IDF version 4.4.5. I just tried in the app_main function and the default stack size seems to be 3.5KB. Increasing the stack size to 8KB solved the problem. I did not try to find the minimum stack size, but I can investigate it if you want.

[supcik]

The work local variable is already taking more than 3KB :

[supcik]

I guess that the code is anyhow not thread safe, so you could solve this issue by defining the work array as static. It will then no longer take place on the stack.