reader_c.go: minor cleanups

reader_c.go

diff --git a/reader_c.go b/reader_c.go
index e3a8eae..f222c6c 100644
--- a/reader_c.go
+++ b/reader_c.go
@@ -134,9 +134,9 @@
 		first = false
 
 		// Decode the raw buffer.
+	inner:
 		for parser.raw_buffer_pos != len(parser.raw_buffer) {
-			var value, value2 rune
-			var incomplete bool
+			var value rune
 			var width int
 
 			raw_unread := len(parser.raw_buffer) - parser.raw_buffer_pos
@@ -187,8 +187,7 @@
 							"incomplete UTF-8 octet sequence",
 							parser.offset, -1)
 					}
-					incomplete = true
-					break
+					break inner
 				}
 
 				// Decode the leading octet.
@@ -278,8 +277,7 @@
 							"incomplete UTF-16 character",
 							parser.offset, -1)
 					}
-					incomplete = true
-					break
+					break inner
 				}
 
 				// Get the character.
@@ -304,12 +302,11 @@
 								"incomplete UTF-16 surrogate pair",
 								parser.offset, -1)
 						}
-						incomplete = true
-						break
+						break inner
 					}
 
 					// Get the next character.
-					value2 = rune(parser.raw_buffer[parser.raw_buffer_pos+low+2]) +
+					value2 := rune(parser.raw_buffer[parser.raw_buffer_pos+low+2]) +
 						(rune(parser.raw_buffer[parser.raw_buffer_pos+high+2]) << 8)
 
 					// Check for a low surrogate area.
@@ -329,11 +326,6 @@
 				panic("impossible")
 			}
 
-			// Check if the raw buffer contains enough bytes to form a character.
-			if incomplete {
-				break
-			}
-
 			// Check if the character is in the allowed range:
 			//      #x9 | #xA | #xD | [#x20-#x7E]               (8 bit)
 			//      | #x85 | [#xA0-#xD7FF] | [#xE000-#xFFFD]    (16 bit)