[PATCH 2/3] doc-rst: Delete output of failed dot-SVG conversion

[Ben Hutchings]

As we use redirection to create the SVG file, even a failed conversion
will create the file and 'make' will consider it up-to-date if the
build is retried.  We should delete it in case of failure.

Fixes: ec868e4ee2bc ("docs-rst: media: build SVG from graphviz files")
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
 Documentation/media/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/media/Makefile b/Documentation/media/Makefile
index 32663602ff25..730d73db7c7a 100644
--- a/Documentation/media/Makefile
+++ b/Documentation/media/Makefile
@@ -36,7 +36,7 @@ quiet_cmd_genpdf = GENPDF  $2
       cmd_genpdf = convert $2 $3
 
 quiet_cmd_gendot = DOT     $2
-      cmd_gendot = dot -Tsvg $2 > $3
+      cmd_gendot = dot -Tsvg $2 > $3 || { rm -f $3; exit 1; }
 
 %.pdf: %.svg
        @$(call cmd,genpdf,$<,$@)

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