Try to work around a libusb crash on exit after SIGINT.

debian/changelog

@@ -8,6 +8,7 @@ dump1090-mutability (1.10.3010.14mu-12) UNRELEASED; urgency=medium
   * Fix sort-by-message-count in the webmap.
   * Always sort missing values at the end of the table, even in a descending sort.
   * Avoid a (rare) divide-by-zero crash in 2MHz --phase-enhance.
+  * Try to work around a libusb crash on exit after SIGINT.
 
  -- Oliver Jowett <oliver@mutability.co.uk>  Fri, 16 Jan 2015 20:34:33 +0000
 

dump1090.c

@@ -1085,7 +1085,8 @@ int main(int argc, char **argv) {
     // Nothing is touching the rtlsdr device now.
 
     if (Modes.filename == NULL) {
-        rtlsdr_close(Modes.dev);
+        // This currently causes crashes within libusb for unknown reasons:
+        //rtlsdr_close(Modes.dev);
     }
 
     pthread_cond_destroy(&Modes.data_cond);     // Thread cleanup - only after the reader thread is dead!