Merge pull request #55 from eldruin/compat-1.31.0

Make compatible with Rust 1.31.0 and prepare patch release

Author: posborne

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "i2cdev"
-version = "0.4.3"
+version = "0.4.4"
 authors = ["Paul Osborne <osbpau@gmail.com>"]
 license = "MIT/Apache-2.0"
 repository = "https://github.com/rust-embedded/rust-i2cdev"

src/mock.rs

@@ -38,7 +38,8 @@ impl I2CRegisterMap {
 impl I2CRegisterMap {
     /// Read data from the device to fill the provided slice
     fn read(&mut self, data: &mut [u8]) -> I2CResult<()> {
-        data.clone_from_slice(&self.registers[self.offset..(self.offset + data.len())]);
+        let len = data.len();
+        data.clone_from_slice(&self.registers[self.offset..(self.offset + len)]);
         println!("READ  | 0x{:X} : {:?}", self.offset - data.len(), data);
         Ok(())
     }