fix resize problems

src/field.h

@@ -87,9 +87,9 @@ public:
   // is constructed by FieldFactory.init()
   Field() = default;
   void resize(size_t count);
-  void resize(size_t count, double value);
-  void resizef(size_t count);
-  void resizef(size_t count, float value);
+  void resize(size_t count, const T value);
+  template<typename U>
+  void resize(size_t count, const U value);
   bool empty() const;
   void check_gridsize() const;
 
@@ -125,7 +125,7 @@ inline void Field<T>::resize(const size_t count)
 }
 
 template<typename T>
-inline void Field<T>::resize(const size_t count, const double value)
+inline void Field<T>::resize(const size_t count, const T value)
 {
   m_count = count;
   varrayResizeInit(vec, m_count, value);
@@ -134,6 +134,17 @@ inline void Field<T>::resize(const size_t count, const double value)
   }
 }
 
+template<typename T>
+template<typename U>
+inline void Field<T>::resize(const size_t count, const U value)
+{
+  m_count = count;
+  varrayResizeInit(vec, m_count, static_cast<T>(value));
+  if (!size) {
+    size = m_count;
+  }
+}
+
 template<typename T>
 inline bool Field<T>::empty() const
 {