Comment out the warning about racy random seed initialization in lh_c…

…har_hash(), if you're on a platform where it'll be triggered it just makes it a pain to build.

linkhash.c

@@ -477,7 +477,7 @@ static unsigned long lh_char_hash(const void *k)
 #elif defined _MSC_VER || defined __MINGW32__
 		InterlockedCompareExchange(&random_seed, seed, -1);
 #else
-#warning "racy random seed initializtion if used by multiple threads"
+//#warning "racy random seed initializtion if used by multiple threads"
 		random_seed = seed; /* potentially racy */
 #endif
 	}