trivial patch to avoid memory leaks during transient noise generation.

This has to be replaced by a rewrite of the noise generating code.

src/frontend/trannoise/1-f-code.c

@@ -142,6 +142,7 @@ trnoise_state_gen(struct trnoise_state *this, CKTcircuit *ckt)
             }
 #endif
 
+            tfree(this->oneof); /* FIXME, this is just a trivial trial to avoid memory leaks */
             this->oneof = TMALLOC(double, newsteps);
             this->oneof_length = newsteps;