callstack missing a newline on some cases

_From [zhao...@google.com](https://code.google.com/u/106321947286816917100/) on May 21, 2012 14:21:05_

A newline is missing at `#5` before malloc-pre
#0 ntdll.dll!RtlCreateHeap+0x3de (0x7c926040 ) modid:0
#1 fp=0x00dbff48 parent=0x00dbff6c KERNEL32.dll!HeapCreate +0x48 (0x7c812c8f ) modid:0
#2 fp=0x00dbff6c parent=0x00dbff80 _heap_init+0x1a [f:\dd\vctools\crt_bld\self_x86\crt\src\heapinit.c:174+0x15](0x00402a50 malloc.exe+0x2a50) modid:0
#3 fp=0x00dbff80 parent=0x00dbffc0 __tmainCRTStartup+0x5c [f:\dd\vctools\crt_bld\self_x86\crt\src\crt0.c:212+0x6](0x00402276 ) modid:0
#5 fp=0x00dbfff0 parent=0x00000000 malloc-pre heap=0x00050000 size=0x1800 flags=0x8

In most cases, the output log is fine as below:
#0 _calloc_impl+0xc4 [f:\dd\vctools\crt_bld\self_x86\crt\src\calloc_impl.c:94+0xf](0x0040278d ) modid:0
#4 fp=0x00dbfff0 parent=0x00000000 alloc type: 4
malloc-pre heap=0x00050000 size=0x214 flags=0x8

_Original issue: http://code.google.com/p/drmemory/issues/detail?id=896_