HttpGet: if downloaded data should be written to output buffer make sure the buffer empty. This prevents old data available to the caller if a HttpGet object is reused and the new request fails.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20432 a1c6a512-1295-4272-9138-f99709370657

rbutil/rbutilqt/base/httpget.cpp

@@ -184,6 +184,11 @@ bool HttpGet::getFile(const QUrl &url)
             return false;
         }
     }
+    else {
+        // output to buffer. Make sure buffer is empty so no old data gets
+        // returned in case the object is reused.
+        dataBuffer.clear();
+    }
     qDebug() << "[HTTP] downloading" << url.toEncoded();
     // create request
     http.setHost(url.host(), url.port(80));