Function stbi_is_hdr

lite/example/cpp_example/mge/cv/stb_image.h:1567–1575

#ifndef STBI_NO_STDIO
STBIDEF int stbi_is_hdr(char const* filename) {
    FILE* f = stbi__fopen(filename, "rb");
    int result = 0;
    if (f) {
        result = stbi_is_hdr_from_file(f);
        fclose(f);
    }
    return result;
}

STBIDEF int stbi_is_hdr_from_file(FILE* f) {
#ifndef STBI_NO_HDR