correct the temperature replacement in ps

TEMPER is in degrees °C

src/frontend/inpcom.c

@@ -7178,9 +7178,9 @@ pspice_compat(struct card *oldcard)
     replace_table(oldcard);
 
     /* add predefined params TEMP, VT, GMIN to beginning of deck */
-    char *new_str = copy(".param temp = 'temper - 273.15'");
+    char *new_str = copy(".param temp = 'temper'");
     newcard = insert_new_line(NULL, new_str, 1, 0);
-    new_str = copy(".param vt = 'temper * 8.6173303e-5'"); /*VT=kT/q, T * 1.380 648 52e-23/ 1.602 176 6208e-19*/
+    new_str = copy(".param vt = '(temper + 273.15) * 8.6173303e-5'");
     nextcard = insert_new_line(newcard, new_str, 2, 0);
     new_str = copy(".param gmin = 1e-12");
     nextcard = insert_new_line(nextcard, new_str, 3, 0);
@@ -7205,9 +7205,9 @@ pspice_compat(struct card *oldcard)
     for (card = newcard; card; card = card->nextcard) {
         char *cut_line = card->line;
         if (ciprefix(".subckt", cut_line)) {
-            new_str = copy(".param temp = 'temper - 273.15'");
+            new_str = copy(".param temp = 'temper'");
             nextcard = insert_new_line(card, new_str, 0, 0);
-            new_str = copy(".param vt = 'temper * 8.6173303e-5'");
+            new_str = copy(".param vt = '(temper + 273.15) * 8.6173303e-5'");
             nextcard = insert_new_line(nextcard, new_str, 1, 0);
         }
     }