RFR 8227373: [lworld] Monitorenter fails with VerifyError: Bad type on operand stack

[Harold Seigel]

Hi,

Please review this small fix to prevent the verifier from throwing a 
VerifyError exception when an inline type is the operand for a 
monitorenter or monitorexit opcode.

Open Webrev: 
http://cr.openjdk.java.net/~hseigel/bug_8227373_lworld/webrev/index.html

JBS Bug: https://bugs.openjdk.java.net/browse/JDK-8227373

The fix was regression tested with tiers 1-3.

Thanks, Harold