C, enh: consider name after "struct", "union", or "enum"

[masatake]

Consider following source file:

 1: struct point { float x; float y; };
 2: struct point point;

When pressing M-. at `|' in "struct rectangle { struct poi|nt a, b };", the tag for the line 1 should have higher priority than the tag for the line 2.

Signed-off-by: Masatake YAMATO yamato@redhat.com

[AmaiKinono]

Thanks!