Fix some OS X/Clang (build) errors.

For rwengine/src/engine/GameData.cpp, `#ifdef __unix__` is used, which
Clang on OS X does not define, thus not finding files while loading.

CMakeLists.txt

@@ -32,6 +32,10 @@ else ()
 	message(FATAL_ERROR "Unknown platform \"${CMAKE_SYSTEM_NAME}\". please update CMakeLists.txt.")
 endif ()
 
+if (${CMAKE_CXX_COMPILER_ID} STREQUAL Clang)
+       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-gnu-array-member-paren-init")
+endif()
+
 # Make GLM use radians
 add_definitions(-DGLM_FORCE_RADIANS)
 

rwengine/include/data/CutsceneData.hpp

@@ -4,6 +4,7 @@
 #include <glm/glm.hpp>
 #include <map>
 #include <vector>
+#include <string>
 
 /**
  * @brief Stores data from .CUT files

rwengine/include/script/ScriptMachine.hpp

@@ -10,6 +10,7 @@
 #include <stack>
 #include <list>
 #include <set>
+#include <array>
 
 #define SCM_NEGATE_CONDITIONAL_MASK 0x8000
 #define SCM_CONDITIONAL_MASK_PASSED 0xFF

rwengine/src/engine/GameData.cpp

@@ -30,7 +30,7 @@
  */
 std::string findPathRealCase(const std::string& base, const std::string& path) 
 {
-#ifdef __unix__
+#ifndef _WIN32
 	size_t endslash = path.find("/");
 	bool isDirectory = true;
 	if(endslash == path.npos) {