simplifications of resolution handling; resolve warnings

Param/Distrib/RangedDistributions.cpp

@@ -44,13 +44,13 @@ IRangedDistribution::IRangedDistribution(size_t n_samples, double sigma_factor)
 
 IRangedDistribution::~IRangedDistribution() = default;
 
-std::vector<ParameterSample> IRangedDistribution::generateSamples(double mean, double stddev) const
+std::vector<ParameterSample> IRangedDistribution::generateSamples(double stddev) const
 {
     if (stddev == 0) // it's a delta distribution
-        return {{mean, 1.0}};
+        return {{0., 1.0}};
     ASSERT(stddev > 0);
 
-    auto generator = distribution(mean, stddev);
+    auto generator = distribution(0., stddev);
     return generator->equidistantSamples(m_n_samples, m_sigma_factor);
 }