_lv_txt_encoded_letter_next_2() function
Decode two encoded character from a string.
Arguments
txt
pointer to '\0' terminated string
letter
the first decoded Unicode character or 0 on invalid data code
letter_next
the second decoded Unicode character or 0 on invalid data code
ofs
start index in 'txt' where to start. After the call it will point to the next encoded char in 'txt'. NULL to use txt[0] as index