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* build: safe update of PATH on Windows (#3419)bas-vk2016-12-111-0/+153
NSIS has a default MAX_STR_LEN of 1024. If $ENV{PATH} is longer the returned string is truncated to an empty string. Its then not possible to distinguis between the variable not set or too long. As a result the variable is set with the location where geth and/or dev tools are installed. This may override any previous set values.