UI: Fix compiler warning when WIN32 is not defined

Fix unused parameter warning.

UI/qt-display.cpp

@@ -197,6 +197,8 @@ bool OBSQTDisplay::nativeEvent(const QByteArray &, void *message, long *)
 	case WM_DISPLAYCHANGE:
 		OnDisplayChange();
 	}
+#else
+	UNUSED_PARAMETER(message);
 #endif
 
 	return false;

UI/window-basic-filters.cpp

@@ -709,6 +709,8 @@ bool OBSBasicFilters::nativeEvent(const QByteArray &, void *message, long *)
 			display->OnDisplayChange();
 		}
 	}
+#else
+	UNUSED_PARAMETER(message);
 #endif
 
 	return false;

UI/window-basic-interaction.cpp

@@ -202,6 +202,8 @@ bool OBSBasicInteraction::nativeEvent(const QByteArray &, void *message, long *)
 			display->OnDisplayChange();
 		}
 	}
+#else
+	UNUSED_PARAMETER(message);
 #endif
 
 	return false;

UI/window-basic-main.cpp

@@ -4753,6 +4753,8 @@ bool OBSBasic::nativeEvent(const QByteArray &, void *message, long *)
 			display->OnDisplayChange();
 		}
 	}
+#else
+	UNUSED_PARAMETER(message);
 #endif
 
 	return false;

UI/window-basic-properties.cpp

@@ -499,6 +499,8 @@ bool OBSBasicProperties::nativeEvent(const QByteArray &, void *message, long *)
 			display->OnDisplayChange();
 		}
 	}
+#else
+	UNUSED_PARAMETER(message);
 #endif
 
 	return false;