Improve cpmtools Makefile, Issue #505

See issue #505.  This change should improve build compatibility if there are multiple variants of ncurses installed.

Thanks and credit to @mabartibin.

Co-Authored-By: mabartibin <16798058+mabartibin@users.noreply.github.com>

Tools/unix/cpmtools/Makefile

@@ -15,8 +15,9 @@ DEFFORMAT=wbw_fd144
 
 # Locate the ncurses libs or try a guess if pkg-config does not exist
 NCURSESLIBS=$(shell if env pkg-config --libs ncurses ; then : ; else echo -lncurses ; fi)
+NCURSESCFLAGS=$(shell if env pkg-config --cflags ncurses ; then : ; fi)
 
-CPPFLAGS = -DDISKDEFS=\"$(DISKDEFS)\" -DFORMAT=\"$(DEFFORMAT)\"
+CPPFLAGS = -DDISKDEFS=\"$(DISKDEFS)\" -DFORMAT=\"$(DEFFORMAT)\" $(NCURSESCFLAGS)
 
 DEVICEOBJ = device_posix.o