Add default impl for VaList

Author: lucic71

libcc2rs/src/va_args.rs

@@ -49,10 +49,6 @@ pub struct VaList<'a> {
 }
 
 impl<'a> VaList<'a> {
-    pub fn empty() -> Self {
-        VaList { args: &[], pos: 0 }
-    }
-
     pub fn new(args: &'a [VaArg]) -> Self {
         VaList { args, pos: 0 }
     }
@@ -64,6 +60,12 @@ impl<'a> VaList<'a> {
     }
 }
 
+impl Default for VaList<'_> {
+    fn default() -> Self {
+        VaList { args: &[], pos: 0 }
+    }
+}
+
 impl Clone for VaList<'_> {
     fn clone(&self) -> Self {
         VaList {