Not unless you initiate the undelegation process. You need to undelegate first from steemitgoldminner for your 50 SP to come back.

If you don't know how you can use this link: https://steemconnect.com/sign/delegateVestingShares?delegator=blaogao&delegatee=steemitgoldminer&vesting_shares=0%20SP

After you initiate the undelegate process, wait for exactly 5 days for your 50 SP to come back. :)