Errors when building with libxml2 ≥ 2.12.0

[ryandesign]

libinfinity 0.7.2 does not build with libxml2 ≥ 2.12.0. Errors from the first encountered file are:

adopted/inf-adopted-session-record.c:88:3: error: use of undeclared identifier 'xmlErrorPtr'
  xmlErrorPtr xmlerror;
  ^

adopted/inf-adopted-session-record.c:91:3: error: use of undeclared identifier 'xmlerror'
  xmlerror = xmlGetLastError();
  ^
adopted/inf-adopted-session-record.c:91:14: error: implicit declaration of function 'xmlGetLastError' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
  xmlerror = xmlGetLastError();
             ^

adopted/inf-adopted-session-record.c:97:5: error: use of undeclared identifier 'xmlerror'
    xmlerror->message
    ^

adopted/inf-adopted-session-record.c:559:3: error: use of undeclared identifier 'xmlErrorPtr'
  xmlErrorPtr xmlerror;
  ^

adopted/inf-adopted-session-record.c:593:5: error: use of undeclared identifier 'xmlerror'
    xmlerror = xmlGetLastError();
    ^
adopted/inf-adopted-session-record.c:593:16: error: implicit declaration of function 'xmlGetLastError' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    xmlerror = xmlGetLastError();
               ^
adopted/inf-adopted-session-record.c:598:7: error: use of undeclared identifier 'xmlerror'
      xmlerror->code,
      ^
adopted/inf-adopted-session-record.c:599:7: error: use of undeclared identifier 'xmlerror'
      xmlerror->message
      ^
adopted/inf-adopted-session-record.c:612:5: error: use of undeclared identifier 'xmlerror'
    xmlerror = xmlGetLastError();
    ^
adopted/inf-adopted-session-record.c:612:16: error: implicit declaration of function 'xmlGetLastError' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    xmlerror = xmlGetLastError();
               ^
adopted/inf-adopted-session-record.c:617:7: error: use of undeclared identifier 'xmlerror'
      xmlerror->code,
      ^
adopted/inf-adopted-session-record.c:618:7: error: use of undeclared identifier 'xmlerror'
      xmlerror->message
      ^
adopted/inf-adopted-session-record.c:674:3: error: use of undeclared identifier 'xmlErrorPtr'
  xmlErrorPtr xmlerror;
  ^

adopted/inf-adopted-session-record.c:723:5: error: use of undeclared identifier 'xmlerror'
    xmlerror = xmlGetLastError();
    ^
adopted/inf-adopted-session-record.c:723:16: error: implicit declaration of function 'xmlGetLastError' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    xmlerror = xmlGetLastError();
               ^
adopted/inf-adopted-session-record.c:728:7: error: use of undeclared identifier 'xmlerror'
      xmlerror->code,
      ^
adopted/inf-adopted-session-record.c:729:7: error: use of undeclared identifier 'xmlerror'
      xmlerror->message
      ^

but many, many other files need fixes too. The problem occurs because libxml2 2.12.0 removed unnecessary inclusions from their headers, exposing areas where your code has not included the necessary headers.