Added 64bits support to ImGui

ImGui/imgui.h

@@ -120,9 +120,14 @@ struct ImGuiTextFilter;             // Helper to parse and apply text filters (e
 
 // Typedefs and Enums/Flags (declared as int for compatibility with old C++, to allow using as flags and to not pollute the top of this file)
 // Use your programming IDE "Go to definition" facility on the names of the center columns to find the actual flags/enum lists.
+#ifndef _WIN64
+#include <cstdint>
+typedef int64_t ImTextureID;
+#else
 #ifndef ImTextureID
 typedef void* ImTextureID;          // User data to identify a texture (this is whatever to you want it to be! read the FAQ about ImTextureID in imgui.cpp)
 #endif
+#endif
 typedef unsigned int ImGuiID;       // Unique ID used by widgets (typically hashed from a stack of string)
 typedef unsigned short ImWchar;     // A single U16 character for keyboard input/display. We encode them as multi bytes UTF-8 when used in strings.
 typedef int ImGuiCol;               // -> enum ImGuiCol_             // Enum: A color identifier for styling