[librsvg] styles: Don't try parsing empty <style>

[Christian Persch <chpe src gnome org>]

commit 2e1c7a77b1dd34bea31c38460f2e60e9cb665ade
Author: Christian Persch <chpe gnome org>
Date:   Mon Mar 19 22:29:14 2012 +0100

    styles: Don't try parsing empty <style>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=672414

 configure.in  |    2 +-
 rsvg-styles.c |    4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/configure.in b/configure.in
index ffa48f8..db3d86d 100644
--- a/configure.in
+++ b/configure.in
@@ -279,7 +279,7 @@ dnl Build introspectable bindings
 
 # No automagic please!
 if test -z "$enable_introspection"; then
-  enable_introspection=no
+  enable_introspection=yes
 fi
 
 GOBJECT_INTROSPECTION_CHECK([0.10.8])
diff --git a/rsvg-styles.c b/rsvg-styles.c
index 5eab4f5..bc55b5a 100644
--- a/rsvg-styles.c
+++ b/rsvg-styles.c
@@ -1133,6 +1133,9 @@ rsvg_parse_cssbuffer (RsvgHandle * ctx, const char *buff, size_t buflen)
     CRDocHandler *css_handler = NULL;
     CSSUserData user_data;
 
+    if (buff == NULL || buflen == 0)
+        return;
+
     css_handler = cr_doc_handler_new ();
     init_sac_handler (css_handler);
 
@@ -1142,7 +1145,6 @@ rsvg_parse_cssbuffer (RsvgHandle * ctx, const char *buff, size_t buflen)
     /* TODO: fix libcroco to take in const strings */
     parser = cr_parser_new_from_buf ((guchar *) buff, (gulong) buflen, CR_UTF_8, FALSE);
     if (parser == NULL) {
-        g_warning (_("Error creating CSS parser\n"));
         cr_doc_handler_unref (css_handler);
         return;
     }