[BUG] Some animations are deformed when building with --std=c11

[jgabaut]

Describe the bug

With version 1.2.9, a --std=c11 flag was added to Makefile.am. However, the unintentional trigraphs in ./src/animations/* files are being replaced with a different literal, and the visuals get corrupted.

I think this would need some update on sprites4curses (see related issue) to not cause this issue anymore, or a downstream patch involving some escaping/breaking up of the offending sequences with sed or something.

To Reproduce

1. Build 1.2.9 (Tag includes the --std=c11 flag)
2. Run and check out examples like Mage or Imp animations.

Expected behavior
Correct display of the animations.

Screenshots

Desktop (please complete the following information):

• OS: Linux x86_64
• Version 1.2.9

Additional context

https://stackoverflow.com/questions/9387166/is-there-a-switch-to-disable-trigraphs-with-clang

Wikipedia:

[...] A programmer may want to place two question marks together yet not have the compiler treat them as introducing a trigraph. The C grammar does not permit two consecutive ? tokens, so the only places in a C file where two question marks in a row may be used are in multi-character constants, string literals, and comments. This is particularly a problem for the classic Mac OS, where the constant '????' may be used as a file type or creator. To safely place two consecutive question marks within a string literal, the programmer can use string concatenation "...?""?..." or an escape sequence "...??...".

[jgabaut]

1.2.10 dropped --std=c11 to avoid the issue, somewhat.

sprites4curses closed the related issue with 0.3.5 (See s4c issue).

I'll try to fix up the animation files ASAP and use the new release.

[jgabaut]

1.3.0 updates s4c to 0.3.5 and fixes the offending animation files, so it can correcty build with --std=c11.
Also, -Wno-trigraphs was removed as we now don't expect to get that warning.