i#1618 drstrace symbol fetching problems, part 1: fix uninit string
i#1618 drstrace symbol fetching problems, part 1: fix uninit string

Fixes the passing of an uninitilized string to
drfront_set_symbol_search_path().

Also normalizes variable names and warning messages.

SVN-Revision: 2050

code4bones/drmemory,code4bones/drmemory,sigma-random/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,code4bones/drmemory,code4bones/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,sigma-random/drmemory,sigma-random/drmemory,code4bones/drmemory,LohithBlaze/drmemory