Fix missing SP-GiST support in 911e7020

911e7020 misses setting of amoptsprocnum for SP-GiST.  This commit fixes
that.

src/backend/access/spgist/spgutils.c

@@ -44,6 +44,7 @@ spghandler(PG_FUNCTION_ARGS)
 
 	amroutine->amstrategies = 0;
 	amroutine->amsupport = SPGISTNProc;
+	amroutine->amoptsprocnum = SPGIST_OPTIONS_PROC;
 	amroutine->amcanorder = false;
 	amroutine->amcanorderbyop = true;
 	amroutine->amcanbackward = false;