* 'master' of https://github.com/tesseract-ocr/tesseract:
Remove code for _MSC_VER < 1900
keep API compatibility with #1265
Update googletest submodule to release v1.8.1
Update test submodule
Always use isascii() with isspace()
Avoid crash with --psm 0 and LSTM traineddata
SVPaint: Remove empty block
Classify: Don't hide debug parameter
UNICHARMAP: Remove comparison which is always false
svpaint: Change a variable from global to local
pgedit: remove unused declaration of display_bln_lines
Plumbing: Remove comparison which is always false
Release candidate 2
use pdf L_FLATE_ENCODE only for png input; fixes#1961
Either it was not needed, or it could be replaced by checking
for not _WIN32.
This fixes a compiler warning from clang:
src/ccutil/platform.h:41:9: warning:
macro name is a reserved identifier [-Wreserved-id-macro]
Signed-off-by: Stefan Weil <sw@weilnetz.de>