[gegl] gegl: in gegl-serialize avoid negative array on index on malformed input

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 8e74e54c33410c5f37620a3a6b7fc531f3c3a878
Author: Øyvind Kolås <pippin gimp org>
Date:   Mon May 18 22:53:31 2020 +0200

    gegl: in gegl-serialize avoid negative array on index on malformed input
    
    Avoid crash that happens when ] brackets are present without first
    having a proper opening bracket.

 gegl/gegl-serialize.c           | 1 +
 operations/common/median-blur.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gegl/gegl-serialize.c b/gegl/gegl-serialize.c
index 7386d133b..0d8a59dac 100644
--- a/gegl/gegl-serialize.c
+++ b/gegl/gegl-serialize.c
@@ -370,6 +370,7 @@ gegl_create_chain_argv (char      **argv,
       else if (!strchr(*arg, '=') && strchr (*arg, ']'))
         {
           level--;
+          if (level < 0) level = 0;
           gegl_node_connect_to (iter[level+1], "output", iter[level],
                                 level_pad[level]);
         }
diff --git a/operations/common/median-blur.c b/operations/common/median-blur.c
index 3d65f72e8..d2f787ca7 100644
--- a/operations/common/median-blur.c
+++ b/operations/common/median-blur.c
@@ -41,7 +41,7 @@ property_enum (neighborhood, _("Neighborhood"),
   description (_("Neighborhood type"))
 
 property_int  (radius, _("Radius"), 3)
-  value_range (-100, 100)
+  value_range (-400, 400)
   ui_range    (0, 100)
   ui_meta     ("unit", "pixel-distance")
   description (_("Neighborhood radius, a negative value will calculate with inverted percentiles"))