Fix FP: tmpnam() expects a valid pointer, an uninitialized array (of conforming size) is fine
New check: Check for unused return values (#653)
#6141 FP: Unknown type is assumed to have size 0.
Loops over all varIds should start at 1.
Catch exceptions in main() only if NDEBUG is defined
Fixed false positive introduced recently: return value of time() does not need to be taken
Added <use-retval/> to manual.docbook
Merge branch 'master' into travis_gcc_testsuite