Changed multi-line C comments into another style.

The left side doesn't look unbalanced.

src/common/filetype.c

@@ -95,8 +95,8 @@ static const FileId TypeTable[] = {
 
 FILETYPE GetFileType (const char* Name)
 /* Determine the type of the given file by looking at the name. If the file
- * type could not be determined, the function returns FILETYPE_UNKOWN.
- */
+** type could not be determined, the function returns FILETYPE_UNKOWN.
+*/
 {
     /* Search for a table entry */
     const FileId* F = GetFileId (Name, TypeTable, FILETYPE_COUNT);