VGMSampColl: Use name instead of sampName

Why we have two name fields I don't know but name is
shown in the UI so it's strange it's not exported as the same thing.

Author: magcius

src/main/VGMSampColl.cpp

@@ -96,7 +96,7 @@ bool VGMSampColl::OnSaveAllAsWav() {
   wstring dirpath = pRoot->UI_GetSaveDirPath();
   if (dirpath.length() != 0) {
     for (uint32_t i = 0; i < samples.size(); i++) {
-      wstring filepath = dirpath + L"\\" + ConvertToSafeFileName(samples[i]->sampName) + L".wav";
+      wstring filepath = dirpath + L"\\" + ConvertToSafeFileName(samples[i]->name) + L".wav";
       samples[i]->SaveAsWav(filepath);
     }
     return true;