gtINDEXCreateInputData: small bug fix

Signed-off-by: preischig <preischig@gmail.com>

zUtil_Indexter/gtINDEXCreateInputData.m

@@ -84,7 +84,11 @@ fprintf('\nLoading reflections from database...\n')
 
 % are we using lines with grain positions?
 [test, ~,~,~,~,~] = mym(sprintf('show columns from %s like "g3dX"', pairtable));
-test = strcmp(test{1}, 'g3dX');
+if isempty(test)
+	test = false;
+else
+	test = strcmp(test{1}, 'g3dX');
+end
 
 % All the pair data are loaded in 'tot'
 if ~test