app_swift patch to fix segfault bug

app_swift-2.0.patch

diff -ruN app_swift-2.0_ast-1.6.orig/app_swift.c app_swift-2.0_ast-1.6/app_swift.c
--- app_swift-2.0_ast-1.6.orig/app_swift.c	2010-06-16 08:35:30.000000000 +0930
+++ app_swift-2.0_ast-1.6/app_swift.c	2010-08-17 20:31:08.000000000 +0930
@@ -409,7 +409,8 @@
 					ASTOBJ_WRLOCK(ps);
 					ps->immediate_exit = 1;
 					ASTOBJ_UNLOCK(ps);
-				} else if (f->frametype == AST_FRAME_DTMF && timeout > 0 && max_digits > 0) {
+				} else {
+					if (f->frametype == AST_FRAME_DTMF && timeout > 0 && max_digits > 0) {
 					char originDTMF = f->subclass;
 					alreadyran = 1;
 					res = 0;
@@ -430,6 +431,7 @@
 					pbx_builtin_setvar_helper(chan, "SWIFT_DTMF", results);
 				}
 				ast_frfree(f);
+				}
 			}
 		}