Ignore nodes without source sections
Ignore nodes without source sections

With the latest truffle changes, source sections do not seem to be mandatory anymore, but we need only those nodes.

Signed-off-by: Stefan Marr <46f1a0bd5592a2f9244ca321b129902a06b53e03@stefan-marr.de>

smarr/SOMns,smarr/SOMns,smarr/SOMns,smarr/SOMns,smarr/SOMns,smarr/SOMns,smarr/SOMns