Fix memory leak in LibSVMFile.cpp -- ./tests/unit/unit-SGSparseMatrix
Fix memory leak in LibSVMFile.cpp -- ./tests/unit/unit-SGSparseMatrix

geektoni/shogun,Saurabh7/shogun,karlnapf/shogun,sorig/shogun,geektoni/shogun,lisitsyn/shogun,lambday/shogun,lisitsyn/shogun,shogun-toolbox/shogun,shogun-toolbox/shogun,lambday/shogun,lambday/shogun,sorig/shogun,geektoni/shogun,besser82/shogun,Saurabh7/shogun,besser82/shogun,lisitsyn/shogun,karlnapf/shogun,shogun-toolbox/shogun,Saurabh7/shogun,shogun-toolbox/shogun,lisitsyn/shogun,besser82/shogun,geektoni/shogun,Saurabh7/shogun,Saurabh7/shogun,sorig/shogun,Saurabh7/shogun,shogun-toolbox/shogun,besser82/shogun,geektoni/shogun,lambday/shogun,karlnapf/shogun,karlnapf/shogun,sorig/shogun,besser82/shogun,Saurabh7/shogun,karlnapf/shogun,lambday/shogun,karlnapf/shogun,shogun-toolbox/shogun,lambday/shogun,lisitsyn/shogun,geektoni/shogun,lisitsyn/shogun,sorig/shogun,sorig/shogun,Saurabh7/shogun,Saurabh7/shogun,besser82/shogun