Build mipmap peaks in capture IO thread, but don't wait on it to finish. May be incorrect.

Timeline/Peaks.C

@@ -574,8 +574,10 @@ Peaks::finish_writing ( void )
     _peak_writer = NULL;
 
     /* now fill in the rest of the cache */
-    if ( ! fork() )
-        exit( make_peaks_mipmap() );
+    make_peaks_mipmap();
+/*     if ( ! fork() ) */
+/*         exit( make_peaks_mipmap() ); */
+
 }
 
 /* THREAD: IO */

Timeline/Record_DS.C

@@ -182,6 +182,8 @@ Record_DS::disk_thread ( void )
 #ifndef AVOID_UNNECESSARY_COPYING
     delete[] cbuf;
 #endif
+
+    _thread = NULL;
 }