Failure building master [macOS]

[Angelo Graziosi]

Current master (c2c9e7e3cbb485d4240f9c9c44694f310711e4e9) fails to build on 
macOS:

[...]
CC       nsselect.o
  CC       nsimage.o
nsselect.m:236:36: error: use of undeclared identifier 'NSPNGPboardType'; did 
you mean 'NSPDFPboardType'?
             @"image/png",         NSPasteboardTypePNG,
                                   ^~~~~~~~~~~~~~~~~~~
                                   NSPDFPboardType
./nsterm.h:1357:29: note: expanded from macro 'NSPasteboardTypePNG'
#define NSPasteboardTypePNG NSPNGPboardType
                            ^
/System/Library/Frameworks/AppKit.framework/Headers/NSPasteboard.h:305:32: 
note: 'NSPDFPboardType' declared here
APPKIT_EXTERN NSPasteboardType NSPDFPboardType;        // Use 
NSPasteboardTypePDF
                               ^
1 error generated.
make[1]: *** [nsselect.o] Error 1
make[1]: *** Waiting for unfinished jobs....
1 warning generated.
make: *** [src] Error 2
Error: Failure running MAKE

Ciao,
 Angelo.