remove apple check, as getpwuid is *nx-safe

io_posix.c

@@ -26,10 +26,8 @@
 #include <libgen.h>
 #include <stdio.h>
 #include <unistd.h>
-#if defined(__APPLE__)
 #include <stdlib.h>
 #include <pwd.h>
-#endif
 
 FILE* ethash_fopen(char const* file_name, char const* mode)
 {
@@ -93,14 +91,12 @@ bool ethash_get_default_dirname(char* strbuf, size_t buffsize)
 	static const char dir_suffix[] = ".ethash/";
 	strbuf[0] = '\0';
 	char* home_dir = getenv("HOME");
-#if defined(__APPLE__)
 	if (!home_dir || strlen(home_dir) == 0)
 	{
 		struct passwd* pwd = getpwuid(getuid());
 		if (pwd)
 			home_dir = pwd->pw_dir;
 	}
-#endif
 	
 	size_t len = strlen(home_dir);
 	if (!ethash_strncat(strbuf, buffsize, home_dir, len)) {