[travis] Add coverity static analysis
[fix] Fix some memory leaks
[travis] Fix travis
[fix] Close file on error
Fix: Avoid useless copying (pass by ref)
Fix buffer overflow with very long TMPDIR. Fix: Close opened files on error
Initialize WQuestion members
Fix: Memory leak in sort_matrix
Fix memory leak
Fix memory leak
Revert a fix (double free)
Fix: Missing comma in list of strings
Fix travis
Fix travis
Merge branch 'master' into coverity_scan