win32_trash() to work correctly on various version of windows.

Careful tests are still required.

src/win32_trash.c

@@ -1,15 +1,37 @@
 #include <windows.h>
+#include <tchar.h>
 
-int win32_trash(char *path);
-int win32_trash(char *path)
+int MoveFileToRecycleBin(const TCHAR *fullPathName);
+int win32_trash(const char *path);
+
+int MoveFileToRecycleBin(const TCHAR *fullPathName)
 {
-  SHFILEOPSTRUCT op;
+  SHFILEOPSTRUCT fileOp;
+  const TCHAR *src = fullPathName;
+  TCHAR *dest;
+
+  fileOp.pFrom = dest = alloca(sizeof(*dest) * (_tcslen(fullPathName) + 2));
+  while((*dest++ = *src++) != _T('\0')) {}
+  *dest = _T('\0');
+
+  fileOp.hwnd = NULL;
+  fileOp.wFunc = FO_DELETE;
+  fileOp.pTo = NULL;
+  fileOp.fFlags = FOF_NOCONFIRMATION | FOF_NOERRORUI | FOF_SILENT | FOF_ALLOWUNDO;
+  return SHFileOperation(&fileOp);
+}
+
+int win32_trash(const char *path)
+{
+  char *p, *src;
   int ret;
-
-  op.wFunc = FO_DELETE;
-  op.pFrom = path;
-  op.fFlags = FOF_SILENT|FOF_ALLOWUNDO;
-  ret = SHFileOperationA(&op);
-
+  
+  src = p = strdup(path);
+  while(*p != '\0'){
+    if (*p == '/') *p = '\\';
+    p++;
+  }
+  ret = MoveFileToRecycleBin(src);
+  free(p);
   return ret;
 }