fix: Missing <cstdlib> include

lib/third_party/imgui/backend/source/imgui_impl_glfw.cpp

@@ -100,7 +100,6 @@
 #endif
 
 // GLFW
-#include <string_view>
 #include <GLFW/glfw3.h>
 
 #ifdef _WIN32
@@ -123,6 +122,11 @@
 #include <unistd.h>             // for usleep()
 #endif
 
+#ifdef __linux__
+#include <string_view>
+#include <cstdlib>
+#endif
+
 #ifdef __EMSCRIPTEN__
 #include <emscripten.h>
 #include <emscripten/html5.h>
@@ -391,7 +395,7 @@ static void ImGui_ImplGlfw_UpdateKeyModifiers(GLFWwindow* window, int mods)
         const auto sessionType = std::getenv("XDG_SESSION_TYPE");
         if (sessionType == nullptr)
             return false;
-        
+
         return std::string_view(sessionType) == "x11";
     }();