fix for #94 (#95)

parse_utf8_char() makes the assumption that at least four bytes or one UTF-8 glyph are still to read in the input.

src/event.rs

@@ -315,7 +315,9 @@ fn parse_utf8_char<I>(c: u8, iter: &mut I) -> Result<char, Error>
         bytes.push(c);
 
         loop {
-            bytes.push(iter.next().unwrap().unwrap());
+            match iter.next() {
+                Some(Ok(next)) => {
+                    bytes.push(next);
                     if let Ok(st) = str::from_utf8(bytes) {
                         return Ok(st.chars().next().unwrap());
                     }
@@ -323,6 +325,9 @@ fn parse_utf8_char<I>(c: u8, iter: &mut I) -> Result<char, Error>
                         return error;
                     }
                 }
+                _ => return error,
+            }
+        }
     }
 }