Fix memory leaks found by paranoia_parallel examples.

In function inp_probe the changes were sufficient for probe-i-dev.cir, but this function has complex control flow in its large for loop. So, I did not want to break it, and thought it better to confine the fixes to this one test circuit. Probably inp_probe needs to be refactored by someone who knows its ins and outs.
In function ENHtranslate_poly the linesource field should be set to string literal "internal" to be consistent with insert_new_line(...) usage for internal cards.

src/frontend/inpc_probe.c

@@ -48,6 +48,7 @@ void inp_probe(struct card* deck)
     int skip_control = 0;
     int skip_subckt = 0;
     wordlist* probes = NULL, *probeparams = NULL, *wltmp, *allsaves = NULL;
+    wordlist *next_wl = NULL;
     bool haveall = FALSE, havedifferential = FALSE, t = TRUE, havesave = FALSE;
     NGHASHPTR instances;   /* instance hash table */
     int ee = 0; /* serial number for sources */
@@ -140,7 +141,12 @@ void inp_probe(struct card* deck)
         }
     }
     /* don't free the wl_word, they belong to the cards */
-    tfree(probes);
+    wltmp = probes;
+    while (wltmp) {
+        next_wl = wltmp->wl_next;
+        tfree(wltmp); // Do not free the wl_word
+        wltmp = next_wl;
+    }
 
     /* Set up the hash table for all instances (instance name is key, data
        is the storage location of the card) */
@@ -188,6 +194,7 @@ void inp_probe(struct card* deck)
         if (!instname)
             continue;
         nghash_insert(instances, instname, card);
+        tfree(instname);
     }
 
     if (haveall || probeparams == NULL) {
@@ -882,6 +889,7 @@ void inp_probe(struct card* deck)
                 tmpcard = nghash_find(instances, instname);
                 if (!tmpcard) {
                     fprintf(stderr, "Warning: Could not find the instance line for %s,\n   .probe %s will be ignored\n", instname, wltmp->wl_word);
+                    tfree(instname);
                     continue;
                 }
                 char* thisline = tmpcard->line;
@@ -917,6 +925,7 @@ void inp_probe(struct card* deck)
                 else if (err == 3) {
                     fprintf(stderr, "Warning: Number of nodes mismatch,\n   .probe %s will be ignored\n", wltmp->wl_word);
                 }
+                tfree(instname);
                 continue;
             }
             else if (!haveall) {
@@ -934,6 +943,9 @@ void inp_probe(struct card* deck)
         }
 
     }
+    if (probeparams) {
+        wl_free(probeparams);
+    }
     nghash_free(instances, NULL, NULL);
 }
 

src/xspice/enh/enhtrans.c

@@ -124,8 +124,8 @@ ENHtranslate_poly(
         l1->linenum = d->linenum;
         l2->linenum = d->linenum;
 
-        l1->linesource = copy("internal");
-        l2->linesource = copy("internal");
+        l1->linesource = "internal";
+        l2->linesource = "internal";
 
         /* Create the translated cards */
         d->error = two2three_translate(d->line, &(l1->line), &(l2->line));