fix bassopus on *nix

AO2XP.py

@@ -6,8 +6,10 @@ app = QtGui.QApplication(sys.argv)
 
 osname = platform.system()
 bassdll = "bass.dll"
+bassopusplugin = "bassopus"
 if osname != "Windows":
     bassdll = "libbass.so"
+    bassopusplugin = "./libbassopus.so"
 
 path = sys.argv[0]
 if osname == "Darwin" and ".app" in path: # bundle
@@ -74,7 +76,7 @@ from pybass import *
 import gameview, mainmenu, options, ini
 
 BASS_Init(ini.read_ini_int("AO2XP.ini", "Audio", "device", -1), 44100, 0, 0, 0)
-BASS_PluginLoad("bassopus", 0)
+BASS_PluginLoad(bassopusplugin, 0)
 shit = gamewindow()
 shit.show()
 sys.exit(app.exec_())