MusE - Linux Music Editor

Running muse 0.9 or 1.0rc3 on x86_64 with glibc 2.10.1 triggers this memory
allocation error:

$ muse
muse: malloc.c:3074: sYSMALLOc: Assertion `(old_top == (((mbinptr) (((char
*) &((av)->bins[((1) - 1) * 2])) - __builtin_offsetof (struct malloc_chunk,
fd)))) && old_size == 0) || ((unsigned long) (old_size) >= (unsigned
long)((((__builtin_offsetof (struct malloc_chunk, fd_nextsize))+((2 *
(sizeof(size_t))) - 1)) & ~((2 * (sizeof(size_t))) - 1))) &&
((old_top)->size & 0x1) && ((unsigned long)old_end & pagemask) == 0)'
failed.
Aborted

Running with MALLOC_CHECK_=1 solves the problem showing errors about
free().

I compiled with debug symbols and running under gdb to locate the error. I
created a simple patch, that solves the problem, but maybe can be wrong
(please check it), just add +2 bytes in 'esize' Pool::grow @ memory.cpp

Take care.