Userland: Fix 64-bit portability issues

Author: https://github.com/gunnarbeutner
Commit: b613817bca
Pull-request: https://github.com/SerenityOS/serenity/pull/6803
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/awesomekling

Userland/Libraries/LibDebug/DebugSession.h

@@ -259,7 +259,7 @@ void DebugSession::run(DesiredInitialDebugeeState initial_debugee_state, Callbac
         Optional<BreakPoint> current_breakpoint;
 
         if (state == State::FreeRun || state == State::Syscall) {
-            current_breakpoint = m_breakpoints.get((void*)((u32)regs.eip - 1));
+            current_breakpoint = m_breakpoints.get((void*)((uintptr_t)regs.eip - 1));
             if (current_breakpoint.has_value())
                 state = State::FreeRun;
         } else {