mate-thumbnail-pixbuf-utils: Fix division by zero

Fixes Clang static analyzer warning:

mate-thumbnail-pixbuf-utils.c:160:17: warning: Division by zero
                                *dest++ = r / n_pixels;
                                          ~~^~~~~~~~~~

1 files changed, 9 insertions, 3 deletions

diff --git a/libmate-desktop/mate-thumbnail-pixbuf-utils.c b/libmate-desktop/mate-thumbnail-pixbuf-utils.c
index b568650..0252c2d 100644
--- a/libmate-desktop/mate-thumbnail-pixbuf-utils.c
+++ b/libmate-desktop/mate-thumbnail-pixbuf-utils.c
@@ -157,9 +157,15 @@ mate_desktop_thumbnail_scale_down_pixbuf (GdkPixbuf *pixbuf,
 					*dest++ = 0;
 				}
 			} else {
-				*dest++ = r / n_pixels;
-				*dest++ = g / n_pixels;
-				*dest++ = b / n_pixels;
+				if (n_pixels != 0) {
+					*dest++ = r / n_pixels;
+					*dest++ = g / n_pixels;
+					*dest++ = b / n_pixels;
+				} else {
+					*dest++ = 0;
+					*dest++ = 0;
+					*dest++ = 0;
+				}
 			}
 			
 			s_x1 = s_x2;