Clean up if statements
CVE-2013-6052 - heap OOB reads, information leaks
CVE-2013-6053 - heap OOB reads, information leaks (only affecting 1.5.1)
CVE-2013-6045 - heap OOB writes
CVE-2013-1447 partial
- null pointer dereferences, division by zero, and anything that would just fit as DoS
- segfault10.patch no longer applicable to tree
- segfault4.patch missed out as workaround, not fix (malloc/calloc substitution)
CVE-2013-6887 - null pointer deref, div by zero, and anything DoS (only affecting 1.5.1)