Resolve #65: Cast char to unsigned in isctype functions

Jan Breuer

2015-11-13 b5e8e4dc2bdeca39195a78d8d7f01bd7f099923c

 libscpi/src/fifo.c

@@ -50,7 +50,7 @@
        return FALSE;
    }

    if(value) {
    if (value) {
        *value = fifo->data[fifo->rd];
    }