Correct small bug due to a copy paste

src/main/java/fr/ill/ics/client/control/plot/PlotyManager.java

@@ -187,7 +187,7 @@ public class PlotyManager {
 				if (PropertyManager.getInstance().getProperty(pplot.dataPlot, ControllerAndPropertyConstants.useGridPropertyName) != null) {
 					use_grid_prop_name = ControllerAndPropertyConstants.useGridPropertyName;
 				}
-				if (PropertyManager.getInstance().getProperty(pplot.dataPlot, ControllerAndPropertyConstants.useGridPropertyName) != null) {
+				if (PropertyManager.getInstance().getProperty(pplot.dataPlot, ControllerAndPropertyConstants.useLogPropertyName) != null) {
 					use_log_prop_name = ControllerAndPropertyConstants.useLogPropertyName;
 				}
 			}