patch 8.2.3207: Vim9: crash when compiling string fails

Problem:    Vim9: crash when compiling string fails. (Yegappan Lakshmanan)
Solution:   Adjust the type stack length.

src/testdir/test_vim9_builtin.vim

@@ -2566,8 +2566,13 @@ def Test_searchpair()
   END
   CheckScriptSuccess(lines)
   assert_equal('yes', g:caught)
-
   unlet g:caught
+
+  lines =<< trim END
+      echo searchpair("a", "b", "c", "d", "1", "f")
+  END
+  CheckDefAndScriptFailure2(lines, 'E1001:', 'E475:')
+
   bwipe!
 enddef
 

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3207,
 /**/
     3206,
 /**/

src/vim9compile.c

@@ -3263,6 +3263,7 @@ compile_string(isn_T *isn, cctx_T *cctx)
 	    semsg(_(e_trailing_arg), s);
 	clear_instr_ga(&cctx->ctx_instr);
 	cctx->ctx_instr = save_ga;
+	++cctx->ctx_type_stack.ga_len;
 	return FAIL;
     }