fix std hover, full capture terminator, bare static calls, void main in run-only images

- hover: a symbol from an embedded library source (tinyvm:std.zc, tinyvm:icon.zc) was
  looked up only in the document; look it up by its qualified name in the library source
  (hover_embedded_sym), and render a method found that way by its line (bs_hover).
- std.capture: allocate one word more than the 256 it holds, so end() terminates inside the buffer.
- a bare call to a static function of the enclosing struct resolves like a bare struct constant
  (mstruct is set for every non-generic struct's methods); the struct's own wins over a global.
- run.zc declares main untyped (fn main();), so a run-only image accepts int, void or untyped main
  with both compilers.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/compiler/types.zc b/src/compiler/types.zc
index c643f0b..6dda110 100644
--- a/src/compiler/types.zc
+++ b/src/compiler/types.zc
@@ -497,8 +497,9 @@ int dtype() {
 	}
 	return 0;
 }
-// the struct whose body or methods are being compiled, when it declares constants: a bare
-// name there is looked up as Struct.name before the global scope
+// the struct whose body or methods are being compiled: a bare name there is looked up as Struct.name
+// (a constant, or a static function called by its bare name) before the global scope, so the struct's
+// own wins over a global of the same name
 char* mstruct;
 // does a constant declaration start in a struct body? const NAME = e;  const T NAME = e;
 // (a field of a const type has no initializer, so the = tells them apart)
@@ -652,6 +653,7 @@ int kw_struct() {
 	}
 	accept(s_semi);
 	i = 0;
+	if (!gen) mstruct = n;
 	while (i < nm) { fn_method_compile = 1; methdef(n, mn[i], mq[i], mst[i], mty[i], mrt[i], mrg[i]); fn_method_compile = 0; i++; }
 	mdg = 0;
 	mstruct = msv;