change the NO_UTF8 flag to the USE_UTF8 flag, and reverse its meaning


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2691 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
diff --git a/src/winio.c b/src/winio.c
index aff5fe0..2eca8c2 100644
--- a/src/winio.c
+++ b/src/winio.c
@@ -2287,7 +2287,7 @@
 	    }
 	}
 #ifdef NANO_WIDE
-	else if (!ISSET(NO_UTF8) && mbwidth(buf_mb) > 1) {
+	else if (ISSET(USE_UTF8) && mbwidth(buf_mb) > 1) {
 	    converted[index++] = ' ';
 	    start_col++;
 
@@ -2353,7 +2353,7 @@
 	    /* If buf contains an invalid multibyte non-control
 	     * character, interpret that character as though it's a
 	     * normal non-control character. */
-	    if (!ISSET(NO_UTF8) && bad_char) {
+	    if (ISSET(USE_UTF8) && bad_char) {
 		char *bad_buf_mb;
 		int bad_buf_mb_len;