Some elements of the new malloc() failure handling. Not all cases work properly yet. Also, library is not threadsafe if malloc() fails right now. (CVS 2800)

FossilOrigin-Name: e1606658f1b4530e3001db4779b5669c8d13c853

src/os_unix.c

@@ -689,6 +689,7 @@ static int unixOpenReadOnly(const char *zFilename, OsFile **pId){
   }
   f.locktype = 0;
   TRACE3("OPEN-RO %-3d %s\n", f.h, zFilename);
+
   return allocateUnixFile(&f, pId);
 }