warning in partioning code

Hi,

Compiling master on debian stretch, gcc 9.3.0 complains:

partbounds.c: In function ‘partition_bounds_merge’:
partbounds.c:1024:21: warning: unused variable ‘inner_binfo’
[-Wunused-variable]
1024 | PartitionBoundInfo inner_binfo = inner_rel->boundinfo;
| ^~~~~~~~~~~

Maybe it can be fixed.

thanks,

Erik Rijkers