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/Utilities/functrace.cpp

@@ -68,7 +68,7 @@ static NonnullOwnPtr<HashMap<void*, X86::Instruction>> instrument_code()
             if (section.name() != ".text")
                 return IterationDecision::Continue;
 
-            X86::SimpleInstructionStream stream((const u8*)((u32)lib.file->data() + section.offset()), section.size());
+            X86::SimpleInstructionStream stream((const u8*)((uintptr_t)lib.file->data() + section.offset()), section.size());
             X86::Disassembler disassembler(stream);
             for (;;) {
                 auto offset = stream.offset();