core-text: Fix some clippy warnings.

core-text/src/font.rs

@@ -270,12 +270,11 @@ impl CTFont {
     pub fn get_bounding_rects_for_glyphs(&self, orientation: CTFontOrientation, glyphs: &[CGGlyph])
                                          -> CGRect {
         unsafe {
-            let result = CTFontGetBoundingRectsForGlyphs(self.as_concrete_TypeRef(),
-                                                         orientation,
-                                                         glyphs.as_ptr(),
-                                                         ptr::null_mut(),
-                                                         glyphs.len() as CFIndex);
-            result
+            CTFontGetBoundingRectsForGlyphs(self.as_concrete_TypeRef(),
+                                            orientation,
+                                            glyphs.as_ptr(),
+                                            ptr::null_mut(),
+                                            glyphs.len() as CFIndex)
         }
     }
 

core-text/src/font_collection.rs

@@ -19,7 +19,6 @@ use core_foundation::set::CFSet;
 use core_foundation::string::{CFString, CFStringRef};
 
 use libc::c_void;
-use std::ptr;
 
 #[repr(C)]
 pub struct __CTFontCollection(c_void);
@@ -82,7 +81,7 @@ pub fn create_for_family(family: &str) -> Option<CTFontCollection> {
         let matched_descs = CTFontDescriptorCreateMatchingFontDescriptors(
                 wildcard_desc.as_concrete_TypeRef(),
                 mandatory_attrs.as_concrete_TypeRef());
-        if matched_descs == ptr::null() {
+        if matched_descs.is_null() {
             return None;
         }
         let matched_descs = CFArray::wrap_under_create_rule(matched_descs);

core-text/src/font_descriptor.rs

@@ -93,23 +93,23 @@ impl StylisticClassAccessors for CTFontStylisticClass {
             | kCTFontSlabSerifsClass
             | kCTFontFreeformSerifsClass;
 
-        return (*self & any_serif_class) != 0;
+        (*self & any_serif_class) != 0
     }
 
     fn is_sans_serif(&self) -> bool {
-        return (*self & kCTFontSansSerifClass) != 0;
+        (*self & kCTFontSansSerifClass) != 0
     }
 
     fn is_script(&self) -> bool {
-        return (*self & kCTFontScriptsClass) != 0;
+        (*self & kCTFontScriptsClass) != 0
     }
 
     fn is_fantasy(&self) -> bool {
-        return (*self & kCTFontOrnamentalsClass) != 0;
+        (*self & kCTFontOrnamentalsClass) != 0
     }
 
     fn is_symbols(&self) -> bool {
-        return (*self & kCTFontSymbolicClass) != 0;
+        (*self & kCTFontSymbolicClass) != 0
     }
 }