for consistency, display high-bit single-byte control characters as Unicode FFFD in UTF-8 mode

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2987 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -89,9 +89,8 @@ CVS code -
 	  history_reset(); changes to nanogetstr(). (DLR)
 	- Various character-handling cleanups.  If we get an invalid
 	  multibyte sequence, treat it as Unicode FFFD (Replacement
-	  Character), unless we're determining if it's a control
-	  character or searching for a match to it.  Also, remove
-	  unneeded variables and checks when parsing multibyte
+	  Character), unless we're searching for a match to it.  Also,
+	  remove unneeded variables and checks when parsing multibyte
 	  sequences.  Changes to is_alnum_mbchar(), is_blank_mbchar(),
 	  is_cntrl_mbchar(), is_punct_mbchar(), control_mbrep(),
 	  mbwidth(), make_mbchar(), parse_mbchar(), mbstrncasecmp(),

src/chars.c

@@ -139,7 +139,7 @@ bool is_cntrl_mbchar(const char *c)
 
 	if (mbtowc(&wc, c, MB_CUR_MAX) < 0) {
 	    mbtowc(NULL, NULL, 0);
-	    wc = (unsigned char)*c;
+	    wc = bad_wchar;
 	}
 
 	return is_cntrl_wchar(wc);