BufferedWriter: flushing: Check for written < size instead of <=

This avoids some issues with InternalWrite returning 0 because
it just cannot write stuff at the moment.

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 71dfc83a21045161c5a765ae1a50535b75ab89a5..0c5d76290ed5d9c26803cb3d7f9b0a5889f61ddd 100644 (file)
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -1222,12 +1222,10 @@ public:
       char *data = writebuffer.get();
       auto size = writebuffer.size();
 
-      while (written <= size) {
+      while (written < size) {
         auto written_this_time = wrapped->InternalWrite(data + written, size - written);
         if (written_this_time < 0)
            return false;
-        if (written_this_time == 0)
-           break;
 
         written += written_this_time;
       }