snack: Mark broken

Besides the hardeningDisable I added, something else is broken.

gcc -c -O -fPIC -DUSE_TCL_STUBS -DUSE_TK_STUBS -DOSS  -I/nix/store/q2k3anmbnwklaxih3brk9g6mxzjv155z-tcl-8.6.6/include -I/tmp/nix-build-tcl-8.6.6.drv-0/tcl8.6.6/generic -I/tmp/nix-build-tk-8.6.6.drv-0/tk8.6.6/generic   -DTCL_81_API -I./../generic -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1  ./../generic/jkFormatMP3.c
./../generic/jkFormatMP3.c:34:26: error: expected declaration specifiers or '...' before '(' token
 #define roundf(x) (floor((x)+(float )0.5f))
                          ^