Fix regex bug on windows

https://github.com/ifduyue/musl/blob/a5aff1972c9e3981566414b09a28e331ccd2be5d/include/alltypes.h.in#L10
https://github.com/ifduyue/musl/blob/a5aff1972c9e3981566414b09a28e331ccd2be5d/arch/x86_64/bits/alltypes.h.in#L1

Author: tl-hbk

win32/regex.h

@@ -12,7 +12,8 @@ extern "C" {
 #define CHARCLASS_NAME_MAX 14
 #define RE_DUP_MAX 255
 
-typedef size_t regoff_t;
+#include <BaseTsd.h>
+typedef SSIZE_T regoff_t;
 // #include <bits/alltypes.h>
 
 typedef struct re_pattern_buffer {