tweak for win32_trash()

src/win32_trash.c

@@ -1,13 +1,17 @@
 #include <windows.h>
+#include <string.h>
+#include <stdlib.h>
 
 int win32_trash(char *path);
 int win32_trash(char *path)
 {
   SHFILEOPSTRUCT op;
-  
+  int ret;
+
   op.wFunc = FO_DELETE;
   op.pFrom = path;
   op.fFlags = FOF_SILENT|FOF_ALLOWUNDO;
-  
-  return SHFileOperationA(&op);
+  ret = SHFileOperationA(&op);
+
+  return ret;
 }