Fix unused variables

SocketRocket/SRWebSocket.m

@@ -645,6 +645,7 @@ static __strong NSData *CRLFCRLF;
             NSUInteger usedLength = 0;
             
             BOOL success = [reason getBytes:(char *)mutablePayload.mutableBytes + sizeof(uint16_t) maxLength:payload.length - sizeof(uint16_t) usedLength:&usedLength encoding:NSUTF8StringEncoding options:NSStringEncodingConversionExternalRepresentation range:NSMakeRange(0, reason.length) remainingRange:&remainingRange];
+            #pragma unused (success)
             
             assert(success);
             assert(remainingRange.length == 0);
@@ -1026,6 +1027,7 @@ static const uint8_t SRPayloadLenMask   = 0x7F;
         } else {
             [self _addConsumerWithDataLength:extra_bytes_needed callback:^(SRWebSocket *self, NSData *data) {
                 size_t mapped_size = data.length;
+                #pragma unused (mapped_size)
                 const void *mapped_buffer = data.bytes;
                 size_t offset = 0;
                 
@@ -1042,7 +1044,6 @@ static const uint8_t SRPayloadLenMask   = 0x7F;
                     assert(header.payload_length < 126 && header.payload_length >= 0);
                 }
                 
-                
                 if (header.masked) {
                     assert(mapped_size >= sizeof(_currentReadMaskOffset) + offset);
                     memcpy(self->_currentReadMaskKey, ((uint8_t *)mapped_buffer) + offset, sizeof(self->_currentReadMaskKey));