bug 240192, nsLocalFileUnix doesn't work with files larger than 2 GB

r+sr=darin

xpcom/io/nsLocalFileUnix.cpp

@@ -1063,9 +1063,12 @@ nsLocalFile::GetFileSize(PRInt64 *aFileSize)
     }
 #endif
 
-    /* XXX autoconf for and use stat64 if available */
     if (!S_ISDIR(mCachedStat.st_mode)) {
+#ifdef STAT_IS_64
+        *aFileSize = mCachedStat.st_size;
+#else
         LL_UI2L(*aFileSize, (PRUint32)mCachedStat.st_size);
+#endif
     }
     return NS_OK;
 }