Handle unknown type during ResolveCall

CallResolver-unknown-type.patch

diff -r 7b06445b390c src/compiler/fan/util/CallResolver.fan
--- a/src/compiler/fan/util/CallResolver.fan	Thu Mar 08 16:54:10 2012 -0500
+++ b/src/compiler/fan/util/CallResolver.fan	Fri Mar 09 12:53:30 2012 +0800
@@ -71,6 +71,12 @@
       ffiCoercion
       return result
     }
+    catch(UnknownTypeErr err)
+    {
+      expr.ctype = ns.error
+      this.err("Unknown type $err.msg while resolving $expr", expr.loc)
+      return expr
+    }
     catch (CompilerErr err)
     {
       expr.ctype = ns.error