Bug 469635. Try to find the right Alsa library to quieten. r+sr=roc

widget/src/gtk2/nsSound.cpp

@@ -172,16 +172,12 @@ nsSound::Init()
     }
 
     if (!libasound) {
-        libasound = PR_LoadLibrary("libasound.so.2");
+        PRFuncPtr func = PR_FindFunctionSymbolAndLibrary("snd_lib_error_set_handler",
+                                                         &libasound);
         if (libasound) {
             snd_lib_error_set_handler_fn snd_lib_error_set_handler =
-                 (snd_lib_error_set_handler_fn) PR_FindFunctionSymbol(libasound, "snd_lib_error_set_handler");
-            if (snd_lib_error_set_handler) {
-                snd_lib_error_set_handler(quiet_error_handler);
-            } else {
-                PR_UnloadLibrary(libasound);
-                libasound = nsnull;
-            }
+                 (snd_lib_error_set_handler_fn) func;
+            snd_lib_error_set_handler(quiet_error_handler);
         }
     }