fix Issue 22411 - importC: Error: cannot implicitly convert expression of type 'const(char*)' to 'char*'

[ibuclaw]

GCC complains about discarding qualifiers in the const char* case, but otherwise it is completely valid.

[dlang-bot]

Thanks for your pull request, @ibuclaw!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	22411	major	importC: Error: cannot implicitly convert expression of type 'const(char*)' to 'char*'

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "stable + dmd#13186"

[ibuclaw]

Relaxed the rule even further. C11 6.3.2.3-7 says "A pointer to an object type may be converted to a pointer to a different object type". To which C compilers seem to interpret this as "all pointers can be implicitly converted to any other pointer".

Again, gcc warns about such code, but otherwise it's completely valid in the UB realm.