Fix compiler errors when including Windows.h...
Fix compiler errors when including Windows.h
The Windef.h (included by Windows.h) defines min and max macros. These
conflict with QBarCategoryAxis::min() and max() functions. Defining
NOMINMAX suppresses the min and max definitions in Windef.h.
Task-number: QTRD-2285
Change-Id: Iff797f8c3ff00a582e600db281f0f79930d7b49a
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>