update RFX: Steps(iStep) --> Steps{iStep}

Author: mohmdRzk

subfun/BIDS_RFX.m

@@ -211,8 +211,8 @@ function BIDS_RFX(action, mmFunctionalSmoothing, mmConSmoothing, opt, isMVPA)
         end
 
         for iStep = 1:length(model.Steps)
-            if strcmp(model.Steps(iStep).Level, 'dataset')
-                grpLvlCon = model.Steps(iStep).AutoContrasts;
+            if strcmp(model.Steps{iStep}.Level, 'dataset')
+                grpLvlCon = model.Steps{iStep}.AutoContrasts;
                 break
             end
         end