PATCH: ensure that %H is followed by {

[Mikael Magnusson <mikachu@xxxxxxxxx>]

The previous code would accept any character after %H assuming it
was a {, which was probably also a buffer overrun sometimes.
---
 Src/prompt.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/Src/prompt.c b/Src/prompt.c
index b1e5041bd2..0d674ceab5 100644
--- a/Src/prompt.c
+++ b/Src/prompt.c
@@ -605,10 +605,12 @@ putpromptchar(int doprint, int endchar)
 	        applytextattributes(TSC_PROMPT);
 		break;
 	    case 'H':
-		bv->fm = parsehighlight(bv->fm + 2, '}', &atr);
-		if (atr != TXT_ERROR) {
-		    treplaceattrs(atr);
-		    applytextattributes(TSC_PROMPT);
+		if (bv->fm[1] == '{') {
+		    bv->fm = parsehighlight(bv->fm + 2, '}', &atr);
+		    if (atr != TXT_ERROR) {
+			treplaceattrs(atr);
+			applytextattributes(TSC_PROMPT);
+		    }
 		}
 		break;
 	    case '[':
-- 
2.38.1