If win32 define ssize_t.

worker.c

@@ -23,6 +23,10 @@
 #include <stdlib.h>
 #include <string.h>
 
+#ifdef WIN32
+#define ssize_t int
+#endif
+
 void* WorkingLoop(void* arguments)
 {
     AtaErrorRegistersChs           ata_chs_error_regs;