#232 nsExec command line length with large strings

[Anonymous]

This patch fix a potential problem using large strings (NSIS_MAX_STRLEN > 1024) with nsExec plugin.
Despite the increased length the command line is truncated to 1024 bytes.
This is caused by a fixed-size buffer used in WinMain function.

This patch can be applied to version 2.46 sources skipping 1 path element

[Nobody/Anonymous]

dynamically allocates WinMain command line buffer in nsexec.c