Added an error message when the declared mean of beta shaped priors is outside...

Added an error message when the declared mean of beta shaped priors is outside the domain of the beta density.
(cherry picked from commit 83a3456eca3495e4a75d2495c5810e28b530d6d4)

matlab/set_prior.m

@@ -166,6 +166,9 @@ bayestopt_.p3(k(k1)) = zeros(length(k1),1);
 k1 = find(isnan(bayestopt_.p4(k)));
 bayestopt_.p4(k(k1)) = ones(length(k1),1);
 for i=1:length(k)
+    if (bayestopt_.p1(k(i))<bayestopt_.p3(k(i))) || (bayestopt_.p1(k(i))>bayestopt_.p4(k(i)))
+        error(['The prior mean of ' bayestopt_.name{k(i)} ' has to be between the lower (' num2str(bayestopt_.p3(k(i))) ') and upper (' num2str(bayestopt_.p4(k(i))) ') bounds of the beta prior density!']);
+    end
     mu = (bayestopt_.p1(k(i))-bayestopt_.p3(k(i)))/(bayestopt_.p4(k(i))-bayestopt_.p3(k(i)));
     stdd = bayestopt_.p2(k(i))/(bayestopt_.p4(k(i))-bayestopt_.p3(k(i)));
     bayestopt_.p6(k(i)) = (1-mu)*mu^2/stdd^2 - mu ;