Closed a memory leak in show command.

ChangeLog

@@ -1,3 +1,14 @@
+2004-08-13  Paolo Nenzi <p.nenzi@ieee.org>
+
+	*   src/frontend/device.c: "show" command leaked 28 bytes for each
+	    group of words since an allocated pointer in line 33 of gens.c
+	    was never freed. It is not possible to free allocated memory 
+	    using that pointer since it is used and its value altered. I
+	    used "listdg" copying original pointer value to it and freeing
+	    memory using "listdg" instead. There were sone "tfree" that 
+	    caused problems for incorrect inputs, I have removed them and  
+	    tested against some bad syntax. Results shows no leaks. 
+
 2004-08-09  Paolo Nenzi <p.nenzi@ieee.org>
 
 	*   Updated and corrected test files in "tests" directory. Added

src/frontend/device.c

@@ -60,7 +60,7 @@ all_show(wordlist *wl, int mode)
     wordlist	*params, *nextgroup, *thisgroup;
     wordlist	*prev, *next, *w;
     int		screen_width;
-    dgen	*dg, *listdg;
+    dgen	*dg, *listdg = NULL;
     int		instances;
     int		i, j, n;
     int		param_flag, dev_flag;
@@ -124,12 +124,16 @@ all_show(wordlist *wl, int mode)
 			else
 				thisgroup = next;
 		}
+		/*
 		tfree(w->wl_word);
 		tfree(w);
+		*/
 		w = NULL;
 	    } else if (eq(w->wl_word, ":")) {
+	    /*
 		tfree(w->wl_word);
 		tfree(w);
+		*/
 		w = NULL;
 		if (!params) {
 		    params = next;
@@ -145,8 +149,10 @@ all_show(wordlist *wl, int mode)
 		}
 	    } else if (eq(w->wl_word, ";") || eq(w->wl_word, ",")) {
 		    nextgroup = next;
+		    /*
 		    tfree(w->wl_word);
 		    tfree(w);
+		    */
 		    w = NULL;
 		    if (prev)
 			prev->wl_next = NULL;
@@ -217,7 +223,12 @@ all_show(wordlist *wl, int mode)
 		printf("\n");
 	    }
 	}
-
+	/* Paolo Nenzi 2004:
+	 * This tfree is necessary to free memory allocated by NEW in 
+	 * dgen_init. It is not possible to free dg since it is casted 
+	 * to NULL from dgen_next and is lost.
+	 */ 
+	tfree(listdg);
 	wl = nextgroup;
 
     } while (wl);