Make improvements

- Get mprotect_test working on aarch64
- Get completion working on python.com repl again
- Improve quality of printvideo.com and printimage.com
- Fix bug in openpty() so examples/script.c works again

libc/calls/openpty.c

@@ -99,7 +99,7 @@ int openpty(int *mfd, int *sfd, char *name,  //
     return efault();
   }
   BLOCK_CANCELLATIONS;
-  rc = openpty(mfd, sfd, name, tio, wsz);
+  rc = openpty_impl(mfd, sfd, name, tio, wsz);
   ALLOW_CANCELLATIONS;
   return rc;
 }

libc/runtime/mprotect.c

@@ -35,8 +35,8 @@
  */
 int mprotect(void *addr, size_t size, int prot) {
   int64_t rc;
-  if (SupportsWindows() && (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC |
-                                     PROT_GROWSDOWN | PROT_GROWSUP))) {
+  if (prot &
+      ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_GROWSDOWN | PROT_GROWSUP)) {
     errno = EINVAL;  // unix checks prot before checking size
     rc = -1;
   } else if (!size) {

libc/runtime/runtime.h

@@ -70,7 +70,7 @@ int __cxa_atexit(void *, void *, void *) libcesque;
 int atfork(void *, void *) libcesque;
 int atexit(void (*)(void)) libcesque;
 char *getenv(const char *) nosideeffect libcesque;
-int putenv(char *) paramsnonnull();
+int putenv(char *);
 int setenv(const char *, const char *, int);
 int unsetenv(const char *);
 int clearenv(void);

libc/str/unicode.h

@@ -32,7 +32,7 @@ struct lconv {
 
 int wcwidth(wchar_t) pureconst;
 int wcswidth(const wchar_t *, size_t) strlenesque;
-int wcsnwidth(const wchar_t *, size_t, int) strlenesque;
+int wcsnwidth(const wchar_t *, size_t, size_t) strlenesque;
 struct lconv *localeconv(void);
 
 COSMOPOLITAN_C_END_

libc/str/wcsnwidth.c

@@ -21,7 +21,7 @@
 /**
  * Returns monospace display width of wide character string.
  */
-int wcsnwidth(const wchar_t *pwcs, size_t n, int o) {
+int wcsnwidth(const wchar_t *pwcs, size_t n, size_t o) {
   int w, width = 0;
   for (; *pwcs && n-- > 0; pwcs++) {
     if ((w = wcwidth(*pwcs)) < 0) {