tdf#103696 ensure glm always uses radians

This is set just locally for OGLTrans, because I have no idea what the
other places that use glm expect...

Change-Id: I83675ef2463ab945cb3d6885f803dcbae60a5558
diff --git a/slideshow/Library_OGLTrans.mk b/slideshow/Library_OGLTrans.mk
index 3dce634..b908a0b 100644
--- a/slideshow/Library_OGLTrans.mk
+++ b/slideshow/Library_OGLTrans.mk
@@ -15,6 +15,10 @@ $(eval $(call gb_Library_add_defs,OGLTrans,\
))
endif

$(eval $(call gb_Library_add_defs,OGLTrans,\
    -DGLM_FORCE_RADIANS \
))

$(eval $(call gb_Library_use_sdk_api,OGLTrans))

$(eval $(call gb_Library_use_libraries,OGLTrans,\