Fix clippy::redundant_field_names

src/software/resampling/context.rs

@@ -60,7 +60,7 @@ impl Context {
                     e if e < 0 => Err(Error::from(e)),
 
                     _ => Ok(Context {
-                        ptr: ptr,
+                        ptr,
 
                         input: Definition {
                             format: src_format,

src/software/scaling/context.rs

@@ -58,7 +58,7 @@ impl Context {
 
             if !ptr.is_null() {
                 Ok(Context {
-                    ptr: ptr,
+                    ptr,
 
                     input: Definition {
                         format: src_format,

src/software/scaling/vector.rs

@@ -14,7 +14,7 @@ pub struct Vector<'a> {
 impl<'a> Vector<'a> {
     pub unsafe fn wrap(ptr: *mut SwsVector) -> Self {
         Vector {
-            ptr: ptr,
+            ptr,
             _own: false,
             _marker: PhantomData,
         }