Fix to p initialisation. Thanks to @Wiijah. Closes #9

Author: David Thomas

include/puzzler/puzzles/random_projection.hpp

@@ -110,7 +110,7 @@ namespace puzzler
 			  ) const
     {
       unsigned n=pInput->n;
-      double p=16/n;
+      double p=16.0/n;
 
       std::vector<uint64_t> acc(n, 0);