Oops, PQExpBufferDataBroken doesn't exist before 9.2.

hlinnaka · hlinnaka · commit 7a858f7bf47d · 2015-07-07T18:54:08.000+03:00
My previous back-patching went wrong.
diff --git a/src/interfaces/libpq/fe-protocol2.c b/src/interfaces/libpq/fe-protocol2.c
@@ -888,7 +888,7 @@ pqGetErrorNotice2(PGconn *conn, bool isError)
 		pqClearAsyncResult(conn);
 		conn->result = res;
 		resetPQExpBuffer(&conn->errorMessage);
-		if (res && !PQExpBufferDataBroken(workBuf) && res->errMsg)
+		if (res && !PQExpBufferBroken(&workBuf) && res->errMsg)
 			appendPQExpBufferStr(&conn->errorMessage, res->errMsg);
 		else
 			printfPQExpBuffer(&conn->errorMessage,
diff --git a/src/interfaces/libpq/fe-protocol3.c b/src/interfaces/libpq/fe-protocol3.c
@@ -877,7 +877,7 @@ pqGetErrorNotice3(PGconn *conn, bool isError)
 			res->errMsg = pqResultStrdup(res, workBuf.data);
 		pqClearAsyncResult(conn);
 		conn->result = res;
-		if (PQExpBufferDataBroken(workBuf))
+		if (PQExpBufferBroken(&workBuf))
 			printfPQExpBuffer(&conn->errorMessage,
 							  libpq_gettext("out of memory"));
 		else
