fix: screen switch now works well with the shell and its "history"

libbozo/src/string/memset.c

@@ -0,0 +1,11 @@
+#include <stddef.h>
+#include <stdint.h>
+
+void *memset(void *str, int c, size_t n)
+{
+	uint8_t *c1 = (uint8_t *)str;
+
+	for (size_t i = 0; i < n; i++)
+		c1[i] = c;
+	return c1;
+}