Ensure a NULL file while debugging cannot crash AEL.

(closes issue #17215)
 Reported by: vazir
 Patches: 
       20100518__issue17215.diff.txt uploaded by tilghman (license 14)
 Tested by: tilghman


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@272260 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/ael/ael.flex

@@ -887,7 +887,7 @@ static void setup_filestack(char *fnamebuf2, int fnamebuf_siz, glob_t *globbuf,
 			   	free(include_stack[include_stack_index].fname);
 				include_stack[include_stack_index].fname = 0;
 			}
-			include_stack[include_stack_index].fname = strdup(my_file);
+			include_stack[include_stack_index].fname = strdup(S_OR(my_file, "<none>"));
 			include_stack[include_stack_index].lineno = my_lineno;
 			include_stack[include_stack_index].colno = my_col+yyleng;
 			if (my_file)

res/ael/ael.tab.c

@@ -3470,7 +3470,7 @@ struct pval *npval(pvaltype type, int first_line, int last_line,
 	z->endline = last_line;
 	z->startcol = first_column;
 	z->endcol = last_column;
-	z->filename = strdup(my_file);
+	z->filename = strdup(S_OR(my_file, "<none>"));
 	return z;
 }
 

res/ael/ael.y

@@ -854,7 +854,7 @@ struct pval *npval(pvaltype type, int first_line, int last_line,
 	z->endline = last_line;
 	z->startcol = first_column;
 	z->endcol = last_column;
-	z->filename = strdup(my_file);
+	z->filename = strdup(S_OR(my_file, "<none>"));
 	return z;
 }
 

res/ael/ael_lex.c

@@ -3444,7 +3444,7 @@ static void setup_filestack(char *fnamebuf2, int fnamebuf_siz, glob_t *globbuf,
 			   	free(include_stack[include_stack_index].fname);
 				include_stack[include_stack_index].fname = 0;
 			}
-			include_stack[include_stack_index].fname = strdup(my_file);
+			include_stack[include_stack_index].fname = strdup(S_OR(my_file, "<none>"));
 			include_stack[include_stack_index].lineno = my_lineno;
 			include_stack[include_stack_index].colno = my_col+yyleng;
 			if (my_file)