fix(imap): only interrupt existing idle connection

src/dc_imap.rs

@@ -1027,6 +1027,8 @@ impl Imap {
     }
 
     pub fn interrupt_idle(&self) {
+        // only kill the connection, if we are actually ideling
+        if self.session.lock().unwrap().0.is_none() {
             if let Some(ref mut stream) = self.session.lock().unwrap().1 {
                 match stream.shutdown(net::Shutdown::Both) {
                     Ok(_) => {}
@@ -1035,7 +1037,9 @@ impl Imap {
                     }
                 }
             }
+        }
 
+        // interrupt fake idle
         let &(ref lock, ref cvar) = &*self.watch.clone();
         let mut watch = lock.lock().unwrap();