[librsvg] rsvg_state_inherit_run(): When inheriting stop_color, mark the presence of the new color

[Federico Mena Quintero <federico src gnome org>]

commit b09d893f0ac263454021d4a232f16611ac281daf
Author: Federico Mena Quintero <federico gnome org>
Date:   Fri Jun 2 10:23:23 2017 -0500

    rsvg_state_inherit_run(): When inheriting stop_color, mark the presence of the new color
    
    This makes pservers-grad-18-b.svg pass again.
    
    It makes me nervous that *that* test breaks often, and we have no
    lower-level tests for that kind of gradient/stop inheritance.
    
    Hmm, do we need to do this for *all* the other properties, too?

 rsvg-styles.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/rsvg-styles.c b/rsvg-styles.c
index e49cc2c..338278e 100644
--- a/rsvg-styles.c
+++ b/rsvg-styles.c
@@ -348,11 +348,13 @@ rsvg_state_inherit_run (RsvgState * dst, const RsvgState * src,
         dst->join = src->join;
     if (function (dst->has_stop_color, src->has_stop_color)) {
         if (dst->stop_color.kind == RSVG_CSS_COLOR_SPEC_INHERIT) {
+            dst->has_stop_color = TRUE;
             dst->stop_color = src->stop_color;
         }
     }
     if (function (dst->has_stop_opacity, src->has_stop_opacity)) {
         if (dst->stop_opacity.kind == RSVG_OPACITY_INHERIT) {
+            dst->has_stop_opacity = TRUE;
             dst->stop_opacity = src->stop_opacity;
         }
     }