randomInt should return signed int

svn path=/trunk/kdesupport/qca/; revision=648706

TODO

@@ -13,7 +13,6 @@
     make sure there aren't any cases where a Foo::supportsBar()-style function
       reports true, but then when the object is created, it doesn't actually
       support the feature (because the wrong provider was used).
-    why is Random returning unsigned?
   code:
     strange backtrace on mac (ask textshell)
   other:
@@ -30,6 +29,7 @@
     tls extensions: hostname and ocsp stapling
     QSecureArray/QBigInteger -> QCA::SecureArray/QCA::BigInteger ?
   code:
+    global random thread-safety?
     tls/sasl
     fix asker implementation, it is a disaster
     dirwatch: thread safety

include/QtCrypto/qca_basic.h

@@ -104,7 +104,7 @@ namespace QCA
 		 * myRandomInt = QCA::Random::randomInt();
 		 * \endcode
 		 */
-		static uint randomInt();
+		static int randomInt();
 
 		/**
 		 * Provide a specified number of random bytes

src/qca_basic.cpp

@@ -48,10 +48,10 @@ uchar Random::randomChar()
 	return globalRNG().nextByte();
 }
 
-uint Random::randomInt()
+int Random::randomInt()
 {
 	QSecureArray a = globalRNG().nextBytes(sizeof(int));
-	uint x;
+	int x;
 	memcpy(&x, a.data(), a.size());
 	return x;
 }