Add a return value to prf_plus_t.allocate_bytes()

src/libstrongswan/crypto/prf_plus.c

@@ -89,7 +89,7 @@ METHOD(prf_plus_t, get_bytes, void,
 	}
 }
 
-METHOD(prf_plus_t, allocate_bytes, void,
+METHOD(prf_plus_t, allocate_bytes, bool,
 	private_prf_plus_t *this, size_t length, chunk_t *chunk)
 {
 	if (length)
@@ -101,6 +101,7 @@ METHOD(prf_plus_t, allocate_bytes, void,
 	{
 		*chunk = chunk_empty;
 	}
+	return TRUE;
 }
 
 METHOD(prf_plus_t, destroy, void,

src/libstrongswan/crypto/prf_plus.h

@@ -44,8 +44,10 @@ struct prf_plus_t {
 	 *
 	 * @param length	number of bytes to get
 	 * @param chunk		chunk which will hold generated bytes
+	 * @return			TRUE if bytes allocated successfully
 	 */
-	void (*allocate_bytes) (prf_plus_t *this, size_t length, chunk_t *chunk);
+	__attribute__((warn_unused_result))
+	bool (*allocate_bytes) (prf_plus_t *this, size_t length, chunk_t *chunk);
 
 	/**
 	 * Destroys a prf_plus_t object.