A copy constructor is needed for CPhysicalQuantity to fix an MSVC2010 linker error introduced by the previous commit.

refs #84

src/blackmisc/pqphysicalquantity.cpp

@@ -20,6 +20,16 @@ namespace BlackMisc
             // void
         }
 
+        /*
+         * Copy constructor
+         * (The implicitly generated copy constructor would suffice, but for what seems to be a bug in MSVC2010 template instantiation)
+         */
+        template <class MU, class PQ> CPhysicalQuantity<MU, PQ>::CPhysicalQuantity(const CPhysicalQuantity &other) :
+            m_value(other.m_value), m_unit(other.m_unit)
+        {
+            // void
+        }
+
         /*
          * Equal operator ==
          */