BSIM 4.7.0 plug memory leak during remcirc

src/spicelib/devices/bsim4/b4dest.c

@@ -37,7 +37,10 @@ BSIM4destroy(
         FREE(pParamOld);
         pParam = NULL;
      /** end of extra code **/
-        if(oldmod) FREE(oldmod);
+        if(oldmod) {
+            FREE(oldmod->BSIM4version);
+            FREE(oldmod);
+        }
         oldmod = mod;
         prev = (BSIM4instance *)NULL;
         for (here = mod->BSIM4instances; here; here = here->BSIM4nextInstance) {
@@ -51,6 +54,8 @@ BSIM4destroy(
         /* free just once for all models */
         FREE(oldmod->BSIM4InstanceArray);
 #endif
+        /* oldmod->BSIM4modName to be freed in INPtabEnd() */
+        FREE(oldmod->BSIM4version);
         FREE(oldmod);
     }
     *model = NULL;

src/spicelib/devices/bsim4/b4set.c

@@ -208,7 +208,7 @@ BSIM4instance **InstArray;
         }
 
         if (!model->BSIM4versionGiven) 
-            model->BSIM4version = "4.7.0";
+            model->BSIM4version = copy("4.7.0");
         if (!model->BSIM4toxrefGiven)
             model->BSIM4toxref = 30.0e-10;
         if (!model->BSIM4eotGiven)