Function ImTextCountUtf8BytesFromChar

tutorials/common/imgui/imgui.cpp:2092–2096

Not optimal but we very rarely use this function.

// Not optimal but we very rarely use this function.
int ImTextCountUtf8BytesFromChar(const char* in_text, const char* in_text_end)
{
    unsigned int unused = 0;
    return ImTextCharFromUtf8(&unused, in_text, in_text_end);
}

static inline int ImTextCountUtf8BytesFromChar(unsigned int c)
{