wince: Build fix, Windows can also run on ARM.

Change-Id: I113a9fd86215700fe11fa5b2bfb8461953b1255b
Reviewed-by: Andreas Holzammer <andreas.holzammer@kdab.com>
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

src/3rdparty/double-conversion/utils.h

@@ -71,6 +71,8 @@
 #else
 #undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS
 #endif  // _WIN32
+#elif defined(WINCE) || defined(_WIN32_WCE)
+#define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
 #else
 #error Target architecture was not detected as supported by Double-Conversion.
 #endif