winemenubuilder: Add a trailing semicolon to MimeType in desktop files.

programs/winemenubuilder/winemenubuilder.c

@@ -2135,7 +2135,7 @@ static BOOL write_freedesktop_association_entry(const char *desktopPath, const c
         fprintf(desktop, "[Desktop Entry]\n");
         fprintf(desktop, "Type=Application\n");
         fprintf(desktop, "Name=%s\n", friendlyAppName);
-        fprintf(desktop, "MimeType=%s\n", mimeType);
+        fprintf(desktop, "MimeType=%s;\n", mimeType);
         fprintf(desktop, "Exec=wine start /ProgIDOpen %s %%f\n", progId);
         fprintf(desktop, "NoDisplay=true\n");
         fprintf(desktop, "StartupNotify=true\n");