SWORD25: Fix regression introduced in 5dd8f2575b0f

Janitorial removed function call which had a side effect.
Thus the actor image load code crashed.

engines/sword25/gfx/image/vectorimage.cpp

@@ -247,6 +247,9 @@ VectorImage::VectorImage(const byte *pFileData, uint fileSize, bool &success, co
 		return;
 	}
 
+	// readout SWF size
+	flashRectToBSRect(bs);
+
 	// Get frame rate and frame count
 	/* uint32 frameRate = */
 	bs.getUInt16();