make mktemp templates more coherent

 fontpreview | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fontpreview b/fontpreview
index ae73a38..69fb3aa 100755
--- a/fontpreview
+++ b/fontpreview
@@ -6,7 +6,7 @@
 
 PIDFILE="$(mktemp --tmpdir fontpreview_XXXXXXXX.pid)"
 FONT_PREVIEW="$(mktemp --tmpdir fontpreview_XXXXXXXX.png)"
-TERMWIN_IDFILE="$(mktemp --tmpdir fontpreview_winid_XXXXXXXX)"
+TERMWIN_IDFILE="$(mktemp --tmpdir fontpreview_XXXXXXXX.termpid)"
 VERSION=1.0.0
 
 # Default values