Apply suggestions from code review

Co-authored-by: Alessandro Decina <alessandro.d@gmail.com>

aya/src/bpf.rs

@@ -57,8 +57,8 @@ pub(crate) struct bpf_map_def {
     pub(crate) max_entries: u32,
     pub(crate) map_flags: u32,
     // optional features
-    pub(crate) id: u32, // id
+    pub(crate) id: u32,
-    pub(crate) pinning: u32,    // pinning
+    pub(crate) pinning: u32,
 }
 
 /// The main entry point into the library, used to work with eBPF programs and maps.

aya/src/obj/mod.rs

@@ -516,7 +516,7 @@ fn parse_map_def(name: &str, data: &[u8]) -> Result<bpf_map_def, ParseError> {
     }
 
     if data.len() <  mem::size_of::<bpf_map_def>() {
-        let mut map_def = bpf_map_def { ..Default::default() };
+        let mut map_def = bpf_map_def::default();
         unsafe {
             ptr::copy(data.as_ptr() as *const bpf_map_def, &mut map_def as *mut bpf_map_def, 1);
             // id and pinning will be garbage data