Fix #428: adding missing include for std::array

std::array is used in test_DataDeflater.cxx, but the include was
missing, some compilers seem to be more strict on that and fail.

Also suppressing a warning by using the static_assert with two
arguments (condition and error string)

Author: matthiasrichter

Utilities/DataCompression/include/DataCompression/DataDeflater.h

@@ -44,7 +44,7 @@ template<typename CodeType, std::size_t Length = 8 * sizeof(CodeType)>
 class CodecIdentity {
 public:
   using code_type = CodeType;
-  static_assert(Length <= 8 * sizeof(code_type));
+  static_assert(Length <= 8 * sizeof(code_type), "CodeType must allow specified bit length");
   static const std::size_t sMaxLength = Length;
 
   CodecIdentity() = default;

Utilities/DataCompression/test/test_DataDeflater.cxx

@@ -32,6 +32,7 @@
 #include <iostream>
 #include <iomanip>
 #include <vector>
+#include <array>
 #include <bitset>
 #include <thread>
 #include <stdexcept>  // exeptions, runtime_error