power_sequencer: update to the latest master

This commit brings Power Sequencer to the current rolling version, that is
commit 9562eb58d164e234f61225250d6ac5ca858ada7b on
https://github.com/GDQuest/blender-power-sequencer/.

I had already made an intermediate commit that added new features and fixed some
bugs. This commit brings bug fixes and many quality of life improvements.

- Human-readable changelog:
  https://github.com/GDQuest/blender-power-sequencer/blob/master/CHANGELOG.md
- 1.4.0 release post:
  https://github.com/GDQuest/blender-power-sequencer/releases/tag/1.4.0
- All the commits since v1.3.0 (previous update + this one in this repository):
  https://github.com/GDQuest/blender-power-sequencer/compare/1.3.0...master

1 files changed, 2 insertions, 2 deletions

diff --git a/power_sequencer/scripts/BPSRender/bpsrender/helpers.py b/power_sequencer/scripts/BPSRender/bpsrender/helpers.py
index df74d333..9ebcf2b0 100644
--- a/power_sequencer/scripts/BPSRender/bpsrender/helpers.py
+++ b/power_sequencer/scripts/BPSRender/bpsrender/helpers.py
@@ -41,14 +41,14 @@ def checktools(tools):
         msg = ["BPSRender couldn't find external dependencies:"]
         msg += [
             "[{check}] {tool}: {path}".format(
-                check="v" if path != "" else "X", tool=tool, path=path or "NOT FOUND"
+                check="v" if path is not "" else "X", tool=tool, path=path or "NOT FOUND"
             )
             for tool, path in check["tools"]
         ]
         msg += [
             (
                 "Check if you have them properly installed and available in the PATH"
-                " environment variable."
+                " environemnt variable."
             ),
             "Exiting...",
         ]