try to fix Windows build

src/ctypes.pxd

@@ -53,9 +53,6 @@ cdef extern from 'taglib/audioproperties.h' namespace 'TagLib::AudioProperties':
         Average = 1
         Accurate = 2
 
-cdef extern from 'taglib/tiostream.h' namespace 'TagLib':
-    ctypedef FileName
-
 cdef extern from 'taglib/tfile.h' namespace 'TagLib':
     cdef cppclass File:
         AudioProperties *audioProperties()
@@ -67,19 +64,30 @@ cdef extern from 'taglib/tfile.h' namespace 'TagLib':
         void removeUnsupportedProperties(StringList&)
 
 
+cdef extern from 'taglib/tiostream.h' namespace 'TagLib':
+    IF UNAME_SYSNAME != "Windows":
+        ctypedef char* FileName
+    ELSE:
+        cdef cppclass FileName:
+            FileName(const char*)
+
 cdef extern from 'taglib/fileref.h' namespace 'TagLib':
     cdef cppclass FileRef:
-        FileRef(const char*, boolean, ReadStyle) except +
+        FileRef(FileName, boolean, ReadStyle) except +
         File* file()
 
         AudioProperties *audioProperties()
         bint save() except +
         PropertyMap properties()
         PropertyMap setProperties(PropertyMap&)
         void removeUnsupportedProperties(StringList&)
-cdef inline FileRef* create_wrapper(unicode path) except +:
-    cdef FileName fn = path.encode('utf-8')
-    return new FileRef(fn,  True, ReadStyle.Average)
+
+cdef inline FileRef* create_wrapper(char* path) except +:
+    IF UNAME_SYSNAME != "Windows":
+        return new FileRef(path,  True, ReadStyle.Average)
+    ELSE:
+        cdef FileName fn = FileName(path)
+        return new FileRef(fn, True, ReadStyle.Average)
 
 cdef extern from 'taglib/taglib.h':
     int TAGLIB_MAJOR_VERSION

src/taglib.pyx

@@ -81,7 +81,7 @@ cdef class File:
                 path = path.decode('utf-8')
             path = Path(path)
         self.path = path
-        self.cFile = ctypes.create_wrapper(str(path))
+        self.cFile = ctypes.create_wrapper(str(path).encode('utf-8'))
         if self.cFile is NULL or self.cFile.file() is NULL or not self.cFile.file().isValid():
             raise OSError(f'Could not read file {path}')