Avoid using a C++ keyword as a structure member name.

Per request from Peter Eisentraut.

src/backend/access/transam/parallel.c

@@ -266,8 +266,9 @@ InitializeParallelDSM(ParallelContext *pcxt)
 	else
 	{
 		pcxt->nworkers = 0;
-		pcxt->private = MemoryContextAlloc(TopMemoryContext, segsize);
-		pcxt->toc = shm_toc_create(PARALLEL_MAGIC, pcxt->private, segsize);
+		pcxt->private_memory = MemoryContextAlloc(TopMemoryContext, segsize);
+		pcxt->toc = shm_toc_create(PARALLEL_MAGIC, pcxt->private_memory,
+								   segsize);
 	}
 
 	/* Initialize fixed-size state in shared memory. */
@@ -538,10 +539,10 @@ DestroyParallelContext(ParallelContext *pcxt)
 	 * If this parallel context is actually in backend-private memory rather
 	 * than shared memory, free that memory instead.
 	 */
-	if (pcxt->private != NULL)
+	if (pcxt->private_memory != NULL)
 	{
-		pfree(pcxt->private);
-		pcxt->private = NULL;
+		pfree(pcxt->private_memory);
+		pcxt->private_memory = NULL;
 	}
 
 	/* Wait until the workers actually die. */

src/include/access/parallel.h

@@ -41,7 +41,7 @@ typedef struct ParallelContext
 	ErrorContextCallback *error_context_stack;
 	shm_toc_estimator estimator;
 	dsm_segment *seg;
-	void *private;
+	void *private_memory;
 	shm_toc *toc;
 	ParallelWorkerInfo *worker;
 } ParallelContext;