Fixed version not to issue warning messages. Original: Revision 26:8f15aa3b052b by Dieter Graef. https://developer.mbed.org/users/DieterGraef/code/SDFileSystem/

Dependencies:   FATFileSystem

Dependents:   F746_AudioPlayerSD F746_SD_WavPlayer F746_SD_GraphicEqualizer_ren0620 F746_SD_TextFile_RW ... more