Fix Valgrind-reported jump/move dep on uninitialised values
Fix Valgrind-reported jump/move dep on uninitialised values

> 878964 errors in context 76 of 76:
> Conditional jump or move depends on uninitialised value(s)
>    at 0x4EBF4E4: spoutsf (libsnd.c:83)
>    by 0x4E81A9A: kperf_nodebug (csound.c:1790)
>    by 0x4E830FE: csoundPerform (csound.c:2253)
>    by 0x109953: main (csound_main.c:328)
>  Uninitialised value was created by a heap allocation
>    at 0x4C2FDAF: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
>    by 0x4EAAE3D: mmalloc (memalloc.c:75)
>    by 0x4E954EC: gen28 (fgens.c:1625)
>    by 0x4E8F6BB: hfgens (fgens.c:236)
>    by 0x4EB0A44: process_score_event (musmon.c:841)
>    by 0x4EB1508: sensevents (musmon.c:1038)
>    by 0x4E83036: csoundPerform (csound.c:2243)
>    by 0x109953: main (csound_main.c:328)

csound/csound,csound/csound,ketchupok/csound,csound/csound,ketchupok/csound,ketchupok/csound,csound/csound,ketchupok/csound,ketchupok/csound,csound/csound,csound/csound,ketchupok/csound,ketchupok/csound,ketchupok/csound,csound/csound,csound/csound,csound/csound,ketchupok/csound,ketchupok/csound,csound/csound