List only *.csv files

Using Arduino Programming Questions
9

and if I change the char to define CSV I get the following error

SdFatLs___list_csv.ino: In function 'uint16_t createPlaylistFile()':
SdFatLs___list_csv:101: error: expected )' before ';' token SdFatLs___list_csv:101: error: expected )' before ';' token
SdFatLs___list_csv:101: error: expected primary-expression before ',' token
SdFatLs___list_csv:101: error: expected )' before ';' token SdFatLs___list_csv:101: error: expected ]' before ';' token
SdFatLs___list_csv:101: error: expected primary-expression before ')' token
SdFatLs___list_csv:101: error: expected `;' before ')' token