Fixes for GCC

Makes jansson library required as well

src/core/List.hpp

@@ -14,6 +14,8 @@ template<typename T>
 class List : public std::vector<T>
 {
 public:
+    typedef typename std::vector<T>::const_reference const_reference;
+    typedef typename std::vector<T>::reference reference;
     size_t    GetCapacity() const { return this->capacity(); }
     size_t    GetCount()    const { return this->size(); }
     const T * GetItems()    const { return this->data(); }
@@ -54,7 +56,7 @@ public:
     {
         for (size_t i = 0; i < this->size(); i++)
         {
-            if (_items[i] == item)
+            if (*this[i] == item)
             {
                 RemoveAt(i);
                 return true;

src/core/Memory.hpp

@@ -31,7 +31,7 @@ namespace Memory
     template<typename T>
     T * Reallocate(T * ptr, size_t size)
     {
-        if (ptr == NULL)
+        if (ptr == nullptr)
         {
             return (T*)malloc(size);
         }
@@ -44,7 +44,7 @@ namespace Memory
     template<typename T>
     T * ReallocateArray(T * ptr, size_t count)
     {
-        if (ptr == NULL)
+        if (ptr == nullptr)
         {
             return (T*)malloc(count * sizeof(T));
         }
@@ -105,7 +105,7 @@ namespace Memory
     {
         for (size_t i = 0; i < count; i++)
         {
-            ptr[i]::~T();
+            ptr[i].~T();
         }
         Free(ptr);
     }

src/core/String.cpp

@@ -60,7 +60,7 @@ namespace String
     {
         const utf8 * lastOccurance = nullptr;
         const utf8 * ch = str;
-        for (; ch != '\0'; ch++)
+        for (; *ch != '\0'; ch++)
         {
             if (*ch == match)
             {

src/core/String.hpp

@@ -7,7 +7,7 @@ extern "C"
 
 namespace String
 {
-    constexpr utf8 * Empty = "";
+    constexpr const utf8 * Empty = "";
 
     bool   IsNullOrEmpty(const utf8 * str);
     bool   Equals(const utf8 * a, const utf8 * b, bool ignoreCase = false);