Update stb_include.h

[junghans]

Fedora is not packaging stb_include.h anymore, due to:

# We choose not to package the “stb_include” library (stb_include.h) because,
# during the package review, it was observed that it follows coding practices
# that make it dangerous to use on untrusted inputs, including but not limited
# to:
#
# - It uses of strcat/strcpy into a fixed-length buffer that is assumed (but
#   not proven) to be large enough for all possible uses
# - It ignores I/O errors (possibly leading to undefined behavior from reading
#   uninitialized memory), and so on.
#
# A substantial rewrite would be required to mitigate these concerns. If a
# request for this library arises, this decision may be revisited, or the
# necessary rewrite may be done and offered upstream. For now, we omit the
# library and expect it will not be missed.

(from https://src.fedoraproject.org/rpms/stb/blob/rawhide/f/stb.spec#_4).

Could that be fixed?

[RobLoach]

Copy and paste the file into your own project, and use the local one.