fixup! Closes finagle#75 - change PostgresClientImpl to not cache fai…

…lures

src/main/scala/com/twitter/finagle/postgres/PostgresClientImpl.scala

@@ -154,25 +154,32 @@ class PostgresClientImpl(
    * Issue a single, prepared SELECT query and wrap the response rows with the provided function.
    */
   override def prepareAndQuery[T](sql: String, params: Param[_]*)(f: Row => T): Future[Seq[T]] = {
-    for {
-      service <- factory()
-      statement = new PreparedStatementImpl("", sql, service)
-      result  <- statement.select(params: _*)(f)
-    } yield result
+    typeMap().flatMap { _ =>
+      for {
+        service   <- factory()
+        statement = new PreparedStatementImpl("", sql, service)
+        result    <- statement.select(params: _*)(f)
+      } yield result
+    }
   }
 
   /*
    * Issue a single, prepared arbitrary query without an expected result set, and provide the affected row count
    */
-  override def prepareAndExecute(sql: String, params: Param[_]*):Future[Int] = for {
-    service   <- factory()
-    statement = new PreparedStatementImpl("", sql, service)
-    OK(count) <- statement.exec(params: _*)
-  } yield count
+  override def prepareAndExecute(sql: String, params: Param[_]*): Future[Int] = {
+    typeMap().flatMap { _ =>
+      for {
+        service   <- factory()
+        statement = new PreparedStatementImpl("", sql, service)
+        OK(count) <- statement.exec(params: _*)
+      } yield count
+    }
+  }
 
 
   /**
     * Close the underlying connection pool and make this Client eternally down
+    *
     * @return
     */
   override def close(): Future[Unit] = {