logwriter: Don't allocate a new buffer if fails to consume current item

Upstream-Status: Pending

Signed-off-by: Xufeng Zhang <xufeng.zhang@windriver.com>
---
--- a/lib/logwriter.c
+++ b/lib/logwriter.c
@@ -1010,7 +1010,7 @@
         {
           status = log_proto_client_post(proto, (guchar *) self->line_buffer->str, self->line_buffer->len, &consumed);
 
-          if (consumed)
+          if (consumed && status != LPS_ERROR)
             log_writer_realloc_line_buffer(self);
 
           if (status == LPS_ERROR)
@@ -1028,7 +1028,7 @@
                     NULL);
           consumed = TRUE;
         }
-      if (consumed)
+      if (consumed && status != LPS_ERROR)
         {
           if (lm->flags & LF_LOCAL)
             step_sequence_number(&self->seq_num);