bug#7907: 24.0.50; trunk build failure

[Sean Sieger]

On Windows 7:

gcc -I. -c -gdwarf-2 -g3  -DEMACSDEBUG -DENABLE_CHECKING -DXASSERTS -fno-crossju
mping  -Ic:/imagesupport/include -Demacs=1 -DHAVE_CONFIG_H -I../nt/inc -DHAVE_NT
GUI=1 -DUSE_CRT_DLL=1 -DPURESIZE=5000000 -o oo/i386/print.o print.c
print.c:53:21: error: ftoastr.h: No such file or directory
make[2]: *** [oo/i386/print.o] Error 1
make[2]: Leaving directory `c:/emacs-24.0.50/src'
make[1]: *** [bootstrap-temacs] Error 2
make[1]: Leaving directory `c:/emacs-24.0.50/src'
make: *** [bootstrap-gmake] Error 2