Fix copy and past mistake in dsge_simulated_theoretical_variance_decomposition

Prevented correct deletion of stale prior MC files

(cherry picked from commit 8ab6c6ef)

matlab/dsge_simulated_theoretical_variance_decomposition.m

@@ -54,7 +54,7 @@ end
 if posterior
     delete_stale_file([M_.dname '/metropolis/' M_.fname '_PosteriorVarianceDecomposition*']);
 else
-    delete_stale_file([M_.dname '/prior/moments/' M_.fname '_PosteriorVarianceDecomposition*']);
+    delete_stale_file([M_.dname '/prior/moments/' M_.fname '_PriorVarianceDecomposition*']);
 end
 
 % Set varlist (vartan)
@@ -159,4 +159,4 @@ for file = 1:NumberOfDrawsFiles
     end
 end
 
-options_.ar = nar;
\ No newline at end of file
+options_.ar = nar;