PATCH: fix for control characters and singlelinezle

[Oliver Kiddle <opk@zsh.org>]

I noticed some weird effects with control characters and the
singlelinezle option. Every control character would appear as ^@ and
change to ^? once the next character is typed (with the next character
not being displayed). Also the cursor is getting positioned over the
last character position of special characters that are rendered as
multiple characters. I guess it's not an option that gets a lot of use.

Oliver

diff --git a/Src/Zle/zle_refresh.c b/Src/Zle/zle_refresh.c
index 6d75b0fda..daa43336e 100644
--- a/Src/Zle/zle_refresh.c
+++ b/Src/Zle/zle_refresh.c
@@ -2429,6 +2429,8 @@ singlerefresh(ZLE_STRING_T tmpline, int tmpll, int tmpcs)
 	}
 	all_attr = mixattrs(special_attr, base_attr);
 
+	if (t0 == tmpcs)
+	    nvcs = vp - vbuf;
 	if (tmpline[t0] == ZWC('\t')) {
 	    for (*vp++ = zr_sp; (vp - vbuf) & 7; )
 		*vp++ = zr_sp;
@@ -2471,7 +2473,7 @@ singlerefresh(ZLE_STRING_T tmpline, int tmpll, int tmpcs)
 		   && (unsigned)tmpline[t0] <= 0xffU
 #endif
 		   ) {
-	    ZLE_INT_T t = tmpline[++t0];
+	    ZLE_INT_T t = tmpline[t0];
 
 	    vp->chr = ZWC('^');
 	    vp->atr = all_attr;
@@ -2508,8 +2510,6 @@ singlerefresh(ZLE_STRING_T tmpline, int tmpll, int tmpcs)
 	    vp++;
 	}
 #endif
-	if (t0 == tmpcs)
-	    nvcs = vp - vbuf - 1;
     }
     if (t0 == tmpcs)
 	nvcs = vp - vbuf;