[librsvg: 10/11] Replace some "if Some(...)" with "?", per cargo-clippy

[Federico Mena Quintero <federico src gnome org>]

commit 5d596ae6776d5c2a106b7591d4effcbb70848f99
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Dec 1 12:01:15 2020 -0600

    Replace some "if Some(...)" with "?", per cargo-clippy

 src/gradient.rs |  6 +-----
 src/pattern.rs  | 11 ++++-------
 2 files changed, 5 insertions(+), 12 deletions(-)
---
diff --git a/src/gradient.rs b/src/gradient.rs
index 96101878..1d9eb7d3 100644
--- a/src/gradient.rs
+++ b/src/gradient.rs
@@ -710,11 +710,7 @@ impl ResolvedGradient {
 
         let params = draw_ctx.push_coord_units(units);
 
-        let transform = if let Some(m) = transform.pre_transform(&self.transform).invert() {
-            m
-        } else {
-            return None;
-        };
+        let transform = transform.pre_transform(&self.transform).invert()?;
 
         let variant = match self.variant {
             ResolvedGradientVariant::Linear { x1, y1, x2, y2 } => GradientVariant::Linear {
diff --git a/src/pattern.rs b/src/pattern.rs
index fd7a5b0c..92680d08 100644
--- a/src/pattern.rs
+++ b/src/pattern.rs
@@ -315,7 +315,10 @@ impl UnresolvedChildren {
 impl ResolvedPattern {
     fn node_with_children(&self) -> Option<Node> {
         match self.children {
+            // This means we didn't find any children among the fallbacks,
+            // so there is nothing to render.
             Children::Empty => None,
+
             Children::WithChildren(ref wc) => Some(wc.upgrade().unwrap()),
         }
     }
@@ -326,13 +329,7 @@ impl ResolvedPattern {
         draw_ctx: &DrawingCtx,
         values: &ComputedValues,
     ) -> Option<UserSpacePattern> {
-        let node_with_children = if let Some(n) = self.node_with_children() {
-            n
-        } else {
-            // This means we didn't find any children among the fallbacks,
-            // so there is nothing to render.
-            return None;
-        };
+        let node_with_children = self.node_with_children()?;
 
         let params = draw_ctx.push_coord_units(self.units.0);