Add -show-system-calls; Update runtime for windows_386; Fix some minor bugs

core/mem/mem.odin

@@ -13,7 +13,7 @@ zero_item :: inline proc(item: $P/^$T) {
 	set(item, 0, size_of(T));
 }
 zero_slice :: proc(data: $T/[]$E) {
-	zero(raw_data(data), size_of(E)*n);
+	zero(raw_data(data), size_of(E)*len(data));
 }
 
 

core/os/os_windows.odin

@@ -203,7 +203,9 @@ stderr := get_std_handle(uint(win32.STD_ERROR_HANDLE));
 
 get_std_handle :: proc "contextless" (h: uint) -> Handle {
 	fd := win32.GetStdHandle(win32.DWORD(h));
-	win32.SetHandleInformation(fd, win32.HANDLE_FLAG_INHERIT, 0);
+	when size_of(uintptr) == 8 {
+		win32.SetHandleInformation(fd, win32.HANDLE_FLAG_INHERIT, 0);
+	}
 	return Handle(fd);
 }
 

core/runtime/procs_windows_386.odin

@@ -1,5 +1,7 @@
 package runtime
 
+@require foreign import "system:int64.lib"
+
 foreign import kernel32 "system:Kernel32.lib"
 
 windows_trap_array_bounds :: proc "contextless" () -> ! {