Description: Fix build failure with GCC-11
  The failure:
  .
  mmfile.cxx: In member function ‘bool mimetic::MMFile::map()’:
  mmfile.cxx:60:14: error: ordered comparison of pointer with integer zero (‘char*’ and ‘int’)
     60 |     if(m_beg > 0)
        |        ~~~~~~^~~
  .
  https://gcc.gnu.org/gcc-11/porting_to.html says:
  .
  GCC 11 now issues a diagnostic for ordered comparisons of pointers against
  constant integers. Commonly this is an ordered comparison against NULL or
  0. These should be equality comparisons, not ordered comparisons.
Origin: upstream
Bug-Debian: https://bugs.debian.org/984235
Applied: bf84940f9021950c80846e6b1a5f8b0b55991b00
Reviewed-by: gregor herrmann <gregoa@debian.org>
Last-Update: 2021-04-13

--- a/mimetic/os/mmfile.cxx
+++ b/mimetic/os/mmfile.cxx
@@ -57,7 +57,7 @@
 bool MMFile::map()
 {
     m_beg = (char*) mmap(0, m_st.st_size, PROT_READ, MAP_SHARED,m_fd,0);
-    if(m_beg > 0)
+    if(m_beg != MAP_FAILED)
     {
         m_end = m_beg + m_st.st_size;
         #if HAVE_MADVISE