Fix indentation bug for i32 and i64 values.

Author: muukong

src/main/java/com/muukong/protobuf/PBNonVarInt32.java

@@ -42,7 +42,7 @@ public String prettyPrint(String indent) {
             result += (tmp << (8 * i));
         }
 
-        return String.format("%s%di32", indent, result);
+        return String.format("%di32", result);
     }
 
     @Override

src/main/java/com/muukong/protobuf/PBNonVarInt64.java

@@ -42,7 +42,7 @@ public String prettyPrint(String indent) {
             result += (tmp << (8 * i));
         }
 
-        return String.format("%s%di64", indent, result);
+        return String.format("%di64", result);
     }
 
     @Override