runtime: increase maximum number of windows callbacks

Fixes #1912.

R=rsc
CC=golang-dev
https://golang.org/cl/4591047

diff --git a/src/pkg/runtime/windows/thread.c b/src/pkg/runtime/windows/thread.c
index 2ce8fae15a324881b08b2eed0a4d4dd9a9e8074a..81ad68033319d76ab15763bfb1dcb83aa5e0c41c 100644 (file)
--- a/src/pkg/runtime/windows/thread.c
+++ b/src/pkg/runtime/windows/thread.c
@@ -373,7 +373,7 @@ runtime·compilecallback(Eface fn, bool cleanstack)
                        return &c->asmbody;
                }
        }
-       if(cbs.n >= 20)
+       if(cbs.n >= 2000)
                runtime·throw("too many callback functions");
        c = runtime·mal(sizeof *c + n);
        c->gobody = fn.data;