Switch to nanoprintf + good spinlock (rflags) = no more FLANTERM ISSUES???

src/string/string.h

@@ -7,6 +7,8 @@
 #ifndef STRING_H
 #define STRING_H
 
+#include <stddef.h>
+
 char *strcpy(char *dest, const char *src);
 char *strcat(char *dest, const char *src);
 void strncpy(char* dst, const char* src, size_t n);