PVS-Studio warning V701 for KDE4

static void lexAppendc(int c)
{
  lexBuf.strs = (char *) realloc(lexBuf.strs, (size_t) .... + 1);
  lexBuf.strs[lexBuf.strsLen] = c;
  ....
}

This suspicious code was found in KDE4 project by PVS-Studio static code analyzer.
Warning message is:
V701 realloc() possible leak: when realloc() fails in allocating memory, original pointer 'lexBuf.strs' is lost. Consider assigning realloc() to a temporary pointer. vcc.y 638

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/