Fix render cancel on Windows

We can nto send SIGINT isgnal on windows, it does not exist.

benchmark/space/__init__.py

@@ -585,7 +585,7 @@ class BENCHMARK_OT_run(bpy.types.Operator):
         # Construct final stats string
         if global_cancel:
             global_result_dict = None
-            self.init_sate()
+            self.init_state()
         else:
             global_result_stats = ""
             for stat in global_result_dict["stats"]:
@@ -602,7 +602,7 @@ class BENCHMARK_OT_run(bpy.types.Operator):
         global global_background_image_path
         global_background_image_path = ""
         # Tag for nice redraw
-        global_progress_status = ""
+        global_progress_status = None
         current_progress = 0.0
         context.area.tag_redraw()
 
@@ -663,7 +663,7 @@ class BENCHMARK_OT_run(bpy.types.Operator):
         context.window_manager.modal_handler_add(self)
         return {'RUNNING_MODAL'}
 
-    def init_sate(self):
+    def init_state(self):
         global global_result_platform
         global global_progress_status
         global global_result_stats
@@ -684,22 +684,23 @@ class BENCHMARK_OT_run(bpy.types.Operator):
         context.area.tag_redraw()
         progress_lock.release()
         if self.progress_provider.process:
-            import signal
-            # Corresponds to usual greeting of blender to hit Ctrl-C
-            # again to abort rendering.
-            self.progress_provider.process.send_signal(signal.SIGINT)
-            self.progress_provider.process.send_signal(signal.SIGINT)
+            if platform.system() == "Windows":
+                self.progress_provider.process.kill()
+            else:
+                import signal
+                # Corresponds to usual greeting of blender to hit Ctrl-C
+                # again to abort rendering.
+                self.progress_provider.process.send_signal(signal.SIGINT)
+                self.progress_provider.process.send_signal(signal.SIGINT)
 
     def cancel(self, context):
         global global_cancel
-        print("CANCEL")
         self.cancel_request(context)
         if self.timer:
             wm = context.window_manager
             wm.event_timer_remove(self.timer)
         if self.thread:
             self.thread.join()
-        print("CANCELLED")
 
 
 class BENCHMARK_OT_save(bpy.types.Operator):