Removed the library pathing for ConversionError from check_length!().

src/macros.rs

@@ -15,7 +15,7 @@ macro_rules! check_length
    {
       if $buffer.len() < $min_bytes
       {
-         return Err(::conversion_error::ConversionError::TooFewBytes);
+         return Err(ConversionError::TooFewBytes);
       }
    };
 
@@ -25,7 +25,7 @@ macro_rules! check_length
    {
       if $buffer.len() > $max_bytes
       {
-         return Err(::conversion_error::ConversionError::TooManyBytes);
+         return Err(ConversionError::TooManyBytes);
       }
    };