QNX: Handle the case where screen returns a refresh rate of 0.

Screen sometimes returns a refresh rate of 0.  This has been observed
on VMWare though it is unknown if this is always the case and whether
it happens on other platforms as well.  Returning a refresh rate of
0 causes animations to fail so we're better off returning a value that
might be wrong than returning 0.

Change-Id: I4846017bcb0d6bd52faad727df4ef6dac1a6250f
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/plugins/platforms/qnx/qqnxscreen.cpp b/src/plugins/platforms/qnx/qqnxscreen.cpp
index f3f93e7f64..d42babb8ab 100644
--- a/src/plugins/platforms/qnx/qqnxscreen.cpp
+++ b/src/plugins/platforms/qnx/qqnxscreen.cpp
@@ -329,7 +329,8 @@ qreal QQnxScreen::refreshRate() const
 {
     screen_display_mode_t displayMode;
     int result = screen_get_display_property_pv(m_display, SCREEN_PROPERTY_MODE, reinterpret_cast<void **>(&displayMode));
-    if (result != 0) {
+    // Screen shouldn't really return 0 but it does so default to 60 or things break.
+    if (result != 0 || displayMode.refresh == 0) {
         qWarning("QQnxScreen: Failed to query screen mode. Using default value of 60Hz");
         return 60.0;
     }