Fix the build on rust nightly and beta

jrmuizel · web-flow · commit dc567b0b078c · 2017-10-23T16:58:42.000-04:00
The regression is filed as rust-lang/rust#45480. It seems this broke because of rust-lang/rust#44287.
diff --git a/src/decoder.rs b/src/decoder.rs
@@ -100,7 +100,7 @@ impl<'a, 'b> Iterator for InstructionIterator<'a, 'b> {
         match self.decoder.decode(self.buffer, self.ip) {
             Ok(Some(insn)) => {
                 self.buffer = &self.buffer[insn.length as usize..];
-                self.ip += insn.length as _;
+                self.ip += insn.length as u64;
                 Some((insn, self.ip))
             }
             _ => None,

Original file line number	Diff line number	Diff line change
`@@ -100,7 +100,7 @@ impl<'a, 'b> Iterator for InstructionIterator<'a, 'b> {`
`100`	`100`	`match self.decoder.decode(self.buffer, self.ip) {`
`101`	`101`	`Ok(Some(insn)) => {`
`102`	`102`	`self.buffer = &self.buffer[insn.length as usize..];`
`103`		`- self.ip += insn.length as _;`
	`103`	`+ self.ip += insn.length as u64;`
`104`	`104`	`Some((insn, self.ip))`
`105`	`105`	`}`
`106`	`106`	`_ => None,`