fixed member access

src/main/java/com/elphel/imagej/lwir/LwirReader.java

@@ -567,7 +567,7 @@ public class LwirReader {
 			}
 		}
 		
-		if (lrp.show_images) {
+		if (lrp.isShowImages()) {
 			if (imps_avg != null) {
 				for (ImagePlus imp: imps_avg) {
 					imp.show();

src/main/java/com/elphel/imagej/lwir/LwirReaderParameters.java

@@ -82,6 +82,9 @@ public class LwirReaderParameters {
 		this.debug_level = level;
 	}
 
+	public boolean isShowImages() {
+		return show_images;
+	}
 	public void setProperties(String prefix,Properties properties){
 		properties.setProperty(prefix+"avg_number",          this.avg_number+"");
 		properties.setProperty(prefix+"lwir_ffc",            this.lwir_ffc+"");