Correctly handle underflow of very small probabilities in displaying logit output

ChangeLog

@@ -9,6 +9,8 @@
 - `enumpoly` would take a very long time on some supports where an equilibrium is located on the
   boundary of the projected game.  Search is now restricted to the interior of the space ruling
   these out; these will always be found by another projection.  (#756)
+- In the graphical interface, the logit correspondence display would fail and terminate the program
+  on very small (<10^{-300}) probabilities.
 
 ## [16.5.1] - unreleased
 

src/gui/dlefglogit.cc

@@ -171,7 +171,12 @@ void LogitBehavList::AddProfile(const wxString &p_text, bool p_forceShow)
   }
   m_lambdas.push_back(std::stod(next.ToStdString()));
   for (size_t i = 1; i <= profile->BehaviorProfileLength(); i++) {
-    (*profile)[i] = std::stod(tok.GetNextToken().ToStdString());
+    try {
+      (*profile)[i] = std::stod(tok.GetNextToken().ToStdString());
+    }
+    catch (std::out_of_range &) {
+      (*profile)[i] = 0.0;
+    }
   }
   m_profiles.push_back(profile);
   if (p_forceShow || m_profiles.size() - GetNumberRows() > 20) {

src/gui/dlnfglogit.cc

@@ -77,7 +77,12 @@ void LogitMixedBranch::AddProfile(const wxString &p_text)
   m_lambdas.push_back(std::stod(next.ToStdString()));
 
   for (size_t i = 1; i <= profile->MixedProfileLength(); i++) {
-    (*profile)[i] = std::stod(tok.GetNextToken().ToStdString());
+    try {
+      (*profile)[i] = std::stod(tok.GetNextToken().ToStdString());
+    }
+    catch (std::out_of_range &) {
+      (*profile)[i] = 0.0;
+    }
   }
 
   m_profiles.push_back(profile);