the exception of "switch". Outputs warnings for unreachable code. Tracks also "return" but doesn't currently make use of this information.
The left side doesn't look unbalanced.
originally written by Henry Spencer and supplied by Harald Arnesen. git-svn-id: svn://svn.cc65.org/cc65/trunk@4737 b7a2c559-68d2-44c3-8de9-860c34a00d81