fixing minor bugs with single unit compilation in gcc with flags on

kernel/types.c

@@ -0,0 +1,9 @@
+#include "types.h"
+
+// Example: Basic memory helper (unnecessary if libc exists)
+void *memset(void *dest, int value, size_t len) {
+    unsigned char *ptr = (unsigned char *)dest;
+    while (len-- > 0)
+        *ptr++ = (unsigned char)value;
+    return dest;
+}