Convert even more strings of locale into utf8, as suggested by Jon Arney.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@15237 57a11ea4-9604-0410-9ed3-97b8803252fd

src/app-utils/gnc-ui-util.c

@@ -770,6 +770,7 @@ gnc_localeconv (void)
   gnc_lconv_set_utf8(&lc.mon_thousands_sep, ",");
   gnc_lconv_set_utf8(&lc.mon_grouping, "\003");
   gnc_lconv_set_utf8(&lc.negative_sign, "-");
+  gnc_lconv_set_utf8(&lc.positive_sign, "");
 
   gnc_lconv_set_char(&lc.frac_digits, 2);
   gnc_lconv_set_char(&lc.int_frac_digits, 2);