Initial revision of the path environment variable manipulation header. Made some minor customizations to the original which was obtained from the NSIS website (prevent the path addition from being added more than once, e.g. if the installer is re-run to repair an installation, or if a newer version is installed on top of an older version).
Initial revision of the path environment variable manipulation header. Made some minor customizations to the original which was obtained from the NSIS website (prevent the path addition from being added more than once, e.g. if the installer is re-run to repair an installation, or if a newer version is installed on top of an older version).

zcnet4/vld,zcnet4/vld,smanders/vld,KindDragon/vld,KindDragon/vld,akaStiX/vld,erdincay/vld,ioannis-e/vld,smanders/vld,slideclick/vld,erdincay/vld,slideclick/vld,dmoulding/vld,akaStiX/vld,dmoulding/vld,ioannis-e/vld