[Bug] CRT shader doesn't work on HTML exports with alone=1

[scambier]

Version 1.1.2624-dev

When exporting an html with the option alone=1, the CRT shader doesn't work.
It prints these error messages non-stop:

Failed to load vertex shader: [tic80.js:8:23405](http://127.0.0.1:8080/tic80.js)
Error: vertex shader is empty. [tic80.js:8:23405](http://127.0.0.1:8080/tic80.js)
Error: pixel shader is empty.

[nesbox]

can't reproduce on the latest dev

[scambier]

Found the issue: the CRT shader works for Lua carts, but not JS (and maybe others) when using alone=1

I guess the CRT code is somehow bounded to Lua, and gets stripped with alone=1

• Works: html-test-lua.zip
• Doesn't work: html-test-js.zip
• Works: html-test-js-not-alone.zip

For all examples, I've used the latest stable build (1.1.2729 Pro), and the default language-specific new cart.

[nesbox]

I reproduced it, thanks

[nesbox]

I moved the shader code from config directly to main.c, this allows us to init CRT effect without Lua.
fixed here 5b97399