Forward declaration of class cannot have a nested name specifier - Rebuild of the Debian archive with clang

"Forward declaration of class cannot have a nested name specifier" build failure(s)
clang 6.0

Versions: 2.9 - 3.0 - 3.1 - 3.2 - 3.3 - 3.4 - 3.4.2 - 3.5.0 - 3.6.0 - 3.8.1 - 3.9.1 - 4.0.1 - 5.0 - 6.0 - 8.0.1 - 9.0.1 - 10.0.0 - 11.0.0 - 12.0.1 - 13.0.0

Package	Version	Supposed error message	Full log
enemylines3	1.2-8	./generators/generators.h:2:7: error: forward declaration of class cannot have a nested name specifier	Log
geotranz	3.3-1	../../GEOTRANS3/java_gui/geotrans3/jni/JNICCSObjectTranslator.h:14:7: error: forward declaration of class cannot have a nested name specifier	Log
granule	1.4.0-7-9	./GrappConf.h:31:7: error: forward declaration of class cannot have a nested name specifier	Log

3 errors

Debian Package rebuild