clean up singleton registration: if you were given an L, use it

stepmania/src/PrefsManager.cpp

@@ -476,7 +476,7 @@ public:
 		if( PREFSMAN )
 		{
 			lua_pushstring(L, "PREFSMAN");
-			PREFSMAN->PushSelf( LUA->L );
+			PREFSMAN->PushSelf( L );
 			lua_settable(L, LUA_GLOBALSINDEX);
 		}
 	}

stepmania/src/ProfileManager.cpp

@@ -654,7 +654,7 @@ public:
 		if( PROFILEMAN )
 		{
 			lua_pushstring(L, "PROFILEMAN");
-			PROFILEMAN->PushSelf( LUA->L );
+			PROFILEMAN->PushSelf( L );
 			lua_settable(L, LUA_GLOBALSINDEX);
 		}
 	}

stepmania/src/ScreenManager.cpp

@@ -666,7 +666,7 @@ public:
 		if( SCREENMAN )
 		{
 			lua_pushstring(L, "SCREENMAN");
-			SCREENMAN->PushSelf( LUA->L );
+			SCREENMAN->PushSelf( L );
 			lua_settable(L, LUA_GLOBALSINDEX);
 		}
 	}

stepmania/src/SongManager.cpp

@@ -1334,7 +1334,7 @@ public:
 		if( SONGMAN )
 		{
 			lua_pushstring(L, "SONGMAN");
-			SONGMAN->PushSelf( LUA->L );
+			SONGMAN->PushSelf( L );
 			lua_settable(L, LUA_GLOBALSINDEX);
 		}
 	}

stepmania/src/StatsManager.cpp

@@ -252,7 +252,7 @@ public:
 		if( STATSMAN )
 		{
 			lua_pushstring(L, "STATSMAN");
-			STATSMAN->PushSelf( LUA->L );
+			STATSMAN->PushSelf( L );
 			lua_settable(L, LUA_GLOBALSINDEX);
 		}
 	}

stepmania/src/ThemeManager.cpp

@@ -933,7 +933,7 @@ public:
 		if( THEME )
 		{
 			lua_pushstring(L, "THEME");
-			THEME->PushSelf( LUA->L );
+			THEME->PushSelf( L );
 			lua_settable(L, LUA_GLOBALSINDEX);
 		}
 	}

stepmania/src/UnlockManager.cpp

@@ -547,7 +547,7 @@ public:
 		if( UNLOCKMAN )
 		{
 			lua_pushstring(L, "UNLOCKMAN");
-			UNLOCKMAN->PushSelf( LUA->L );
+			UNLOCKMAN->PushSelf( L );
 			lua_settable(L, LUA_GLOBALSINDEX);
 		}
 	}