Fix select timeout to be 50msec instead of 0.5msec

Closes: #799857

apt-pkg/acquire.h

@@ -281,7 +281,7 @@ class pkgAcquire
     *
     *  \return the result of the download.
     */
-   RunResult Run(int PulseInterval=500000);
+   RunResult Run(int PulseInterval=50000000);
 
    /** \brief Remove all items from this download process, terminate
     *  all download workers, and empty all queues.

apt-pkg/install-progress.h

@@ -42,7 +42,7 @@ namespace Progress {
 
     virtual void Pulse() {};
     virtual long GetPulseInterval() {
-         return 500000;
+         return 50000000;
     };
 
     virtual bool StatusChanged(std::string PackageName,