[librsvg] pattern.rs: Implement FromStr for PatternContentUnits

[Federico Mena Quintero <federico src gnome org>]

commit c7d4ad44f1651c9d8f0c87c99ed0f5121a0e7371
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Mar 21 16:53:29 2017 -0600

    pattern.rs: Implement FromStr for PatternContentUnits

 rust/src/pattern.rs |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/rust/src/pattern.rs b/rust/src/pattern.rs
index 7fa3653..3a82687 100644
--- a/rust/src/pattern.rs
+++ b/rust/src/pattern.rs
@@ -58,6 +58,14 @@ impl Default for PatternContentUnits {
     }
 }
 
+impl FromStr for PatternContentUnits {
+    type Err = AttributeError;
+
+    fn from_str (s: &str) -> Result<PatternContentUnits, AttributeError> {
+        Ok (PatternContentUnits::from (PaintServerUnits::from_str (s)?))
+    }
+}
+
 extern "C" {
     fn rsvg_pattern_node_to_rust_pattern (node: *const RsvgNode) -> *mut Pattern;
 }