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

libbozo/headers/string.h

@@ -8,4 +8,5 @@ int strncmp(const char *s1, const char *s2, size_t n);
 size_t strlen(const char *str);
 char *strstr(const char *haystack, const char *needle);
 void *memcpy(void *dest, const void *src, size_t n);
-int memcmp(const void *s1, const void *s2, size_t n);
+int memcmp(const void *s1, const void *s2, size_t n);
+void *memset(void *str, int c, size_t n);

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;
+}