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der'>2013-04-10cgit.c: Do not restore unset environment variablesLukas Fleischer getenv() returns a NULL pointer if the specified variable name cannot be found in the environment. However, some setenv() implementations crash if a NULL pointer is passed as second argument. Only restore variables that are not NULL. See commit d96d2c98ebc4c2d3765f5b35c4142e0e828a421b for a related patch. Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de> 2013-04-09t0107: Use `tar -z` for gzip'ed archivesLukas Fleischer