From 69faf5cf97d71e24a30bcb736ac51fc2c91dbf54 Mon Sep 17 00:00:00 2001
From: Mark Watkins <jedimark@users.sourceforge.net>
Date: Sun, 28 Feb 2016 11:59:41 +1000
Subject: [PATCH] Philips PB/CSR flag length on older machines don't look like
 they double

---
 sleepyhead/SleepLib/loader_plugins/prs1_loader.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sleepyhead/SleepLib/loader_plugins/prs1_loader.cpp b/sleepyhead/SleepLib/loader_plugins/prs1_loader.cpp
index e5c8594c..d73a4251 100644
--- a/sleepyhead/SleepLib/loader_plugins/prs1_loader.cpp
+++ b/sleepyhead/SleepLib/loader_plugins/prs1_loader.cpp
@@ -1308,7 +1308,11 @@ bool PRS1Import::ParseF0Events()
             break;
 
         case 0x0f: // Cheyne Stokes Respiration
-            data[0] = (buffer[pos + 1] << 8 | buffer[pos]) * 2;
+            data[0] = (buffer[pos + 1] << 8 | buffer[pos]);
+            if (event->familyVersion > 4) {
+                 // might not doublerize on older machines
+                data[0] *= 2;
+            }
             pos += 2;
             data[1] = buffer[pos++];
             tt = t - qint64(data[1]) * 1000L;