mingw: move the file_attr_to_st_mode() function definition

In preparation for making this function a bit more complicated (to allow
for special-casing the `ContainerMappedDirectories` in Windows
containers, which look like a symbolic link, but are not), let's move it
out of the header.

Signed-off-by: JiSeop Moon <zcube@zcube.kr>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: ZCube

Diff for: compat/mingw.c

@@ -4272,3 +4272,17 @@ int is_inside_windows_container(void)
 
 	return inside_container;
 }
+
+int file_attr_to_st_mode (DWORD attr, DWORD tag)
+{
+	int fMode = S_IREAD;
+	if ((attr & FILE_ATTRIBUTE_REPARSE_POINT) && tag == IO_REPARSE_TAG_SYMLINK)
+		fMode |= S_IFLNK;
+	else if (attr & FILE_ATTRIBUTE_DIRECTORY)
+		fMode |= S_IFDIR;
+	else
+		fMode |= S_IFREG;
+	if (!(attr & FILE_ATTRIBUTE_READONLY))
+		fMode |= S_IWRITE;
+	return fMode;
+}

Diff for: compat/win32.h

@@ -6,19 +6,7 @@
 #include <windows.h>
 #endif
 
-static inline int file_attr_to_st_mode (DWORD attr, DWORD tag)
-{
-	int fMode = S_IREAD;
-	if ((attr & FILE_ATTRIBUTE_REPARSE_POINT) && tag == IO_REPARSE_TAG_SYMLINK)
-		fMode |= S_IFLNK;
-	else if (attr & FILE_ATTRIBUTE_DIRECTORY)
-		fMode |= S_IFDIR;
-	else
-		fMode |= S_IFREG;
-	if (!(attr & FILE_ATTRIBUTE_READONLY))
-		fMode |= S_IWRITE;
-	return fMode;
-}
+extern int file_attr_to_st_mode (DWORD attr, DWORD tag);
 
 static inline int get_file_attr(const char *fname, WIN32_FILE_ATTRIBUTE_DATA *fdata)
 {