Don't us atexit(), but delete memory during 'quit'

src/frontend/misccoms.c

@@ -34,6 +34,7 @@ extern char history_file[];
 
 #ifdef SHARED_MODULE
 extern void rem_controls(void);
+extern void destroy_wallace(void);
 #endif
 
 extern IFsimulator SIMinfo;
@@ -80,6 +81,8 @@ com_quit(wordlist *wl)
         cp_remvar("sourcepath");
         cp_remvar("program");
         cp_remvar("prompt");
+
+        destroy_wallace();
     }
 
     rem_controls();

src/frontend/trannoise/wallace.c

@@ -62,7 +62,7 @@ PolarGauss(double* py1, double* py2)
 }
 
 
-static void
+void
 destroy_wallace(void)
 {
     tfree(pool1);
@@ -93,8 +93,6 @@ initw(void)
     addrif = TMALLOC(unsigned int, (n + NOTRANS));
     addrib = TMALLOC(unsigned int, (n + NOTRANS));
 
-    atexit(destroy_wallace);
-
     /* fill the first pool with normally distributed values */
     PolarGauss(&pool1[0], &pool1[1]);
     for (i = 1; i < n>>1; i++)