[fcformat] Add element filtering and deletion

The filtering, '%{+elt1,elt2,elt3{subexpr}}' will evaluate subexpr
with a pattern only having the listed elements from the surrounding
pattern.

The deletion, '%{-elt1,elt2,elt3{subexpr}}' will evaluate subexpr
with a the surrounding pattern sans the listed elements.

1 files changed, 5 insertions, 2 deletions

diff --git a/fc-scan/fc-scan.c b/fc-scan/fc-scan.c
index 573f7ef5..1f023fb3 100644
--- a/fc-scan/fc-scan.c
+++ b/fc-scan/fc-scan.c
@@ -165,8 +165,11 @@ main (int argc, char **argv)
 	    FcChar8 *s;
 
 	    s = FcPatternFormat (pat, format);
-	    printf ("%s", s);
-	    free (s);
+	    if (s)
+	    {
+		printf ("%s", s);
+		free (s);
+	    }
 	}
 	else
 	{