Travis: restore build on GCC 4.4

.travis.yml

@@ -2,6 +2,12 @@ sudo: false
 language: cpp
 matrix:
   include:
+    - compiler: gcc
+      addons:
+        apt:
+          sources: ['ubuntu-toolchain-r-test']
+          packages: ['g++-4.4']
+      env: SCRIPT=cmake GCC=4.4
     - compiler: gcc
       addons:
         apt:

src/ArduinoJson/Configuration.hpp

@@ -139,7 +139,7 @@
 #ifndef ARDUINOJSON_LITTLE_ENDIAN
 #if defined(_MSC_VER) ||                                                      \
     (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || \
-    (defined(__LITTLE_ENDIAN__))
+    defined(__LITTLE_ENDIAN__) || defined(__i386) || defined(__x86_64)
 #define ARDUINOJSON_LITTLE_ENDIAN 1
 #else
 #define ARDUINOJSON_LITTLE_ENDIAN 0

src/ArduinoJson/MsgPack/endianess.hpp

@@ -9,6 +9,7 @@
 
 namespace ARDUINOJSON_NAMESPACE {
 
+#if ARDUINOJSON_LITTLE_ENDIAN
 inline void fixEndianess(uint8_t *p, integral_constant<size_t, 8>) {
   swap(p[0], p[7]);
   swap(p[1], p[6]);
@@ -29,10 +30,12 @@ inline void fixEndianess(uint8_t*, integral_constant<size_t, 1>) {}
 
 template <typename T>
 inline void fixEndianess(T &value) {
-#if ARDUINOJSON_LITTLE_ENDIAN
   fixEndianess(reinterpret_cast<uint8_t *>(&value),
                integral_constant<size_t, sizeof(T)>());
-#endif
 }
+#else
+template <typename T>
+inline void fixEndianess(T &) {}
+#endif
 
 }  // namespace ARDUINOJSON_NAMESPACE