Fixes for MSVC compilation

Summary: Closes https://github.com/facebook/rocksdb/pull/1669

Differential Revision: D4327421

Pulled By: yiwu-arbug

fbshipit-source-id: 661ee0b

java/rocksjni/portal.h

@@ -159,7 +159,7 @@ class StatusJni : public RocksDBNativeClass<rocksdb::Status*, StatusJni> {
       case rocksdb::Status::Code::kTryAgain:
         return 0xD;
       default:
-        return 0xFF;  // undefined
+        return 0x7F;  // undefined
     }
   }
 
@@ -176,9 +176,9 @@ class StatusJni : public RocksDBNativeClass<rocksdb::Status*, StatusJni> {
       case rocksdb::Status::SubCode::kLockLimit:
         return 0x3;
       case rocksdb::Status::SubCode::kMaxSubCode:
-        return 0xFE;
+        return 0x7E;
       default:
-        return 0xFF;  // undefined
+        return 0x7F;  // undefined
     }
   }
 };

java/src/main/java/org/rocksdb/Status.java

@@ -92,7 +92,7 @@ public class Status {
     MutexTimeout( (byte)0x1),
     LockTimeout(  (byte)0x2),
     LockLimit(    (byte)0x3),
-    MaxSubCode(   (byte)0xFE);
+    MaxSubCode(   (byte)0x7E);
 
     private final byte value;