Removed static from function impacting windows build

src/low-level/imf/mailimf.c

@@ -1170,7 +1170,7 @@ int mailimf_atom_parse(const char * message, size_t length,
 }
 
 LIBETPAN_EXPORT
-static int mailimf_fws_atom_for_word_parse(const char * message, size_t length,
+int mailimf_fws_atom_for_word_parse(const char * message, size_t length,
                                            size_t * indx, char ** result, int * p_missing_closing_quote)
 {
   size_t end;