Fix CI: random class issue, t-eoRoulette and update the workflow

.github/workflows/build_ubuntu_debug.yml

@@ -1,10 +1,5 @@
 name: Build Debug (Ubuntu)
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
+on: [push, pull_request]
 
 env:
   # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)

eo/src/eoProportionalSelect.h

@@ -68,16 +68,12 @@ public:
       }
       assert(not _pop[0].invalid());
 
-      const typename EOT::Fitness min_fit
-          = std::min_element( std::begin(_pop), std::end(_pop) )
-              ->fitness();
-
       cumulative.clear();
-      cumulative.push_back(_pop[0].fitness() - min_fit);
+      cumulative.push_back(_pop[0].fitness() );
 
       for (unsigned i = 1; i < _pop.size(); ++i) {
           assert(not _pop[i].invalid());
-          cumulative.push_back(cumulative.back() + _pop[i].fitness() - min_fit);
+          cumulative.push_back(cumulative.back() + _pop[i].fitness());
       }
       assert(cumulative.size() == _pop.size());
   }

eo/src/ga/eoBitOp.h

@@ -361,10 +361,10 @@ template<class Chrom> class eoUBitXover: public eoQuadOp<Chrom>
         {
           if (chrom1[i] != chrom2[i] && eo::rng.flip(preference))
             {
-              // bool tmp = chrom1[i];
-              // chrom1[i]=chrom2[i];
-              // chrom2[i] = tmp;
-              std::swap(chrom1[i], chrom2[i]);
+              bool tmp = chrom1[i];
+              chrom1[i]=chrom2[i];
+              chrom2[i] = tmp;
+              // std::swap(chrom1[i], chrom2[i]);
               changed = true;
             }
         }