fix some of the many warnings

stepmania/src/crypto51/files.cpp

@@ -112,7 +112,7 @@ unsigned int FileStore::CopyRangeTo2(BufferedTransformation &target, unsigned lo
 		return 0;	// don't try to seek beyond the end of file
 	}
 	m_stream->seekg(newPosition);
-	unsigned long total = 0;
+
 	try
 	{
 		assert(!m_waiting);

stepmania/src/crypto51/osrng.cpp

@@ -87,7 +87,7 @@ void NonblockingRng::GenerateBlock(byte *output, unsigned int size)
 	if (!CryptGenRandom(m_Provider.GetProviderHandle(), size, output))
 		throw OS_RNG_Err("CryptGenRandom");
 #else
-	if (read(m_fd, output, size) != size)
+	if (read(m_fd, output, size) != int(size))
 		throw OS_RNG_Err("read /dev/urandom");
 #endif
 }

stepmania/src/crypto51/rsa.cpp

@@ -9,7 +9,8 @@
 #include "sha.h"
 #include "algparam.h"
 
-#include "oaep.cpp"
+//This isn't in the repository and doesn't seem to be used
+//#include "oaep.cpp"
 
 NAMESPACE_BEGIN(CryptoPP)
 
@@ -73,6 +74,7 @@ class RSAPrimeSelector : public PrimeSelector
 {
 public:
 	RSAPrimeSelector(const Integer &e) : m_e(e) {}
+    virtual ~RSAPrimeSelector() { }
 	bool IsAcceptable(const Integer &candidate) const {return RelativelyPrime(m_e, candidate-Integer::One());}
 	Integer m_e;
 };