Fix typos in comments

Author: umlaeute

src/eventhandler/EventHandler.cpp

@@ -500,7 +500,7 @@ void EventHandler::SourceCreatedMultiHandler(void *param, calldata_t *data)
 	}
 }
 
-// Only called for destruction of a public sourcs
+// Only called for destruction of a public source
 // Used as a fallback if an input/scene is not explicitly removed
 void EventHandler::SourceDestroyedMultiHandler(void *param, calldata_t *data)
 {

src/eventhandler/EventHandler_Scenes.cpp

@@ -133,7 +133,7 @@ void EventHandler::HandleCurrentPreviewSceneChanged()
 {
 	OBSSourceAutoRelease currentPreviewScene = obs_frontend_get_current_preview_scene();
 
-	// This event may be called when OBS is not in studio mode, however retreiving the source while not in studio mode will return null.
+	// This event may be called when OBS is not in studio mode, however retrieving the source while not in studio mode will return null.
 	if (!currentPreviewScene)
 		return;
 

src/eventhandler/types/EventSubscription.h

@@ -22,7 +22,7 @@ with this program. If not, see <https://www.gnu.org/licenses/>
 namespace EventSubscription {
 	enum EventSubscription {
 		/**
-		* Subcription value used to disable all events.
+		* Subscription value used to disable all events.
 		*
 		* @enumIdentifier None
 		* @enumValue 0

src/utils/Compat.h

@@ -24,7 +24,7 @@ with this program. If not, see <https://www.gnu.org/licenses/>
 
 namespace Utils {
 	namespace Compat {
-		// Reimplement QRunnable for std::function. Retrocompatability for Qt < 5.15
+		// Reimplement QRunnable for std::function. Retrocompatibility for Qt < 5.15
 		class StdFunctionRunnable : public QRunnable {
 			std::function<void()> cb;