[PATCH cairo v2 2/8] bo: Check null return from _cairo_malloc_ab() (CID #1159556)

_cairo_malloc_ab() can return NULL under some circumstances, and all
other callers of this routine in the Cairo codebase check its return, so
do so here as well.

Coverity ID: #1159556

Reviewed-by: Uli Schlachter <[email protected]>
Signed-off-by: Bryce Harrington <[email protected]>
---
 src/cairo-bentley-ottmann.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/cairo-bentley-ottmann.c b/src/cairo-bentley-ottmann.c
index 91e41f9..afe3a63 100644
--- a/src/cairo-bentley-ottmann.c
+++ b/src/cairo-bentley-ottmann.c
@@ -1484,10 +1484,13 @@ _cairo_bentley_ottmann_tessellate_polygon (cairo_traps_t	 *traps,
 	ymin = _cairo_fixed_integer_floor (polygon->limit.p1.y);
 	ymax = _cairo_fixed_integer_ceil (polygon->limit.p2.y) - ymin;
 
-	if (ymax > 64)
+	if (ymax > 64) {
 	    event_y = _cairo_malloc_ab(sizeof (cairo_bo_event_t*), ymax);
-	else
+	    if (unlikely (event_y == NULL))
+		return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+	} else {
 	    event_y = stack_event_y;
+	}
 	memset (event_y, 0, ymax * sizeof(cairo_bo_event_t *));
     }
 
-- 
2.7.4

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