* harbour/include/hbcompat.ch
+ added translation rules for extended code blocks
* harbour/source/compiler/gencc.c
* cleaned C compiler warnings in -gc3 output and SWITCH <exp>
statement
* harbour/source/compiler/complex.c
* harbour/source/compiler/harbour.y
* harbour/source/compiler/harbour.yyc
* allow to use 0d0 and 0d00000000 as empty date value
* harbour/source/pp/Makefile
* workaround for problems with some GNU make versions,
f.e. 3.76.1 on OS2
ad2ab41638