hush: fix func_return2.tests on NOMMU

function                                             old     new   delta
hush_main                                           1714    1718      +4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

shell/hush.c

@@ -9393,6 +9393,13 @@ int hush_main(int argc, char **argv)
 # if ENABLE_HUSH_LOOPS
 			optarg++;
 			G.depth_of_loop = bb_strtou(optarg, &optarg, 16);
+# endif
+# if ENABLE_HUSH_FUNCTIONS
+			/* nommu uses re-exec trick for "... | func | ...",
+			 * should allow "return".
+			 * This accidentally allows returns in subshells.
+			 */
+			G_flag_return_in_progress = -1;
 # endif
 			break;
 		}