bugfix: don't clobber LINES with real terminal size

- In basta.prepare_term, if we already know how many reserved
  rows there are, we should not be calling
  bsata.query_terminal_lines to get the real terminal size
  into LINES. We need to get that into a local variable and
  then subtract form that the lines we know are reserved,
  and use that for setting the number of lines.

1 files changed, 4 insertions, 3 deletions

diff --git a/basta.sh b/basta.sh
index e528924..ce37890 100644
--- a/basta.sh
+++ b/basta.sh
@@ -23,13 +23,14 @@ basta.query_terminal_lines()
 
 basta.prepare_term()
 {
+  local realrows
+  basta.query_terminal_lines realrows
+
   if [ -z "$basta_prev_reserved_rows" ] ; then
-    local realrows
-    basta.query_terminal_lines realrows
     basta_prev_reserved_rows=$((realrows - LINES))
     printf "\n\033[A"
   else
-    basta.query_terminal_lines LINES
+    LINES=$((realrows - $basta_prev_reserved_rows))
   fi
 
   basta_scroll_lines=$((LINES - 1))