From c3e65e9d43a62e894fb28091809c30d7bcc066d1 Mon Sep 17 00:00:00 2001
From: John Darrington <john@darrington.wattle.id.au>
Date: Fri, 12 Dec 2008 20:34:41 +0900
Subject: [PATCH] Fix some runtime warnings

---
 lib/gtksheet/gtksheet.c | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/lib/gtksheet/gtksheet.c b/lib/gtksheet/gtksheet.c
index 088a1aba..955e77e2 100644
--- a/lib/gtksheet/gtksheet.c
+++ b/lib/gtksheet/gtksheet.c
@@ -226,12 +226,20 @@ static gboolean
 on_column_boundary (const GtkSheet *sheet, gint x, gint *column)
 {
   gint col;
+  gint pixel;
 
   x += sheet->hadjustment->value;
 
+  if ( x < 0)
+    return FALSE;
+
   col = column_from_xpixel (sheet, x);
 
-  if ( column_from_xpixel (sheet, x - DRAG_WIDTH / 2) < col )
+  pixel = x - DRAG_WIDTH / 2;
+  if (pixel < 0)
+    pixel = 0;
+
+  if ( column_from_xpixel (sheet, pixel) < col )
     {
       *column = col - 1;
       return TRUE;
@@ -250,12 +258,20 @@ static gboolean
 on_row_boundary (const GtkSheet *sheet, gint y, gint *row)
 {
   gint r;
+  gint pixel;
 
   y += sheet->vadjustment->value;
 
+  if ( y < 0)
+    return FALSE;
+
   r = row_from_ypixel (sheet, y);
 
-  if ( row_from_ypixel (sheet, y - DRAG_WIDTH / 2) < r )
+  pixel = y - DRAG_WIDTH / 2;
+  if (pixel < 0)
+    pixel = 0;
+
+  if ( row_from_ypixel (sheet, pixel) < r )
     {
       *row = r - 1;
       return TRUE;
@@ -5095,6 +5111,9 @@ set_column_width (GtkSheet *sheet,
   if (column < 0 || column >= psppire_axis_unit_count (sheet->haxis))
     return;
 
+  if ( width <= 0)
+    return;
+
   psppire_axis_resize (sheet->haxis, column, width);
 
   if (GTK_WIDGET_REALIZED (GTK_WIDGET (sheet)))
@@ -5117,6 +5136,9 @@ set_row_height (GtkSheet *sheet,
   if (row < 0 || row >= psppire_axis_unit_count (sheet->vaxis))
     return;
 
+  if (height <= 0)
+    return;
+
   psppire_axis_resize (sheet->vaxis, row, height);
 
   if (GTK_WIDGET_REALIZED (GTK_WIDGET (sheet)) )
-- 
2.30.2