Merge remote-tracking branch 'origin' into develop
Define STBI_HEADER_FILE_ONLY more explicitly
Implement rpl_malloc/rpl_realloc for mingw target
Add malloc stub files
Add malloc_stub.c to target source files
Include malloc_stub.h
Fix for reading STDIN of windows console
Don't use _O_BINARY to prevent build error
Link malloc_stub.c with sixel2png
Check O_BINARY definition
Check errno.h
Rebuild configure script
Respect HAVE_ERRNO_H
Respect HAVE_O_BINARY, HAVE_SET_MODE, HAVE__SET_MODE
Support STDIN on windows console
Improve error handling
Get rid of utf8_t
Add new target winetest
Checks also _O_BINARY
Fix build for some environment which have only _O_BINARY