Pass ENABLE_DEBUG into external/libetonyek

(and consequently fix the argument type of one assert invocation)

Change-Id: I8bf5f024cc104a3885f7b9bf6ed63b9f6259d47b

external/libetonyek/ExternalProject_libetonyek.mk

@@ -30,7 +30,7 @@ $(call gb_ExternalProject_get_state_target,libetonyek,build) :
 			--enable-static \
 			--disable-shared \
 			--without-docs \
-			--disable-debug \
+			$(if $(ENABLE_DEBUG),--enable-debug,--disable-debug) \
 			--disable-werror \
 			--disable-weffc \
 			--without-tools \

external/libetonyek/UnpackedTarball_libetonyek.mk

@@ -11,6 +11,10 @@ $(eval $(call gb_UnpackedTarball_UnpackedTarball,libetonyek))
 
 $(eval $(call gb_UnpackedTarball_set_tarball,libetonyek,$(ETONYEK_TARBALL)))
 
-$(eval $(call gb_UnpackedTarball_set_patchlevel,libetonyek,1))
+$(eval $(call gb_UnpackedTarball_set_patchlevel,libetonyek,0))
+
+$(eval $(call gb_UnpackedTarball_add_patches,libetonyek, \
+    external/libetonyek/assert.patch \
+))
 
 # vim: set noet sw=4 ts=4:

external/libetonyek/assert.patch

+--- src/lib/EtonyekDocument.cpp
++++ src/lib/EtonyekDocument.cpp
+@@ -7,6 +7,8 @@
+  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+  */
+ 
++#include <cassert>
++
+ #include <boost/scoped_ptr.hpp>
+ #include <boost/shared_ptr.hpp>
+ #include <boost/logic/tribool.hpp>
+@@ -179,7 +181,7 @@
+     info.input->seek(0, RVNG_SEEK_SET);
+   }
+ 
+-  assert(!isGzipped);
++  assert(bool(!isGzipped));
+ 
+   return probeXMLImpl(info.input, probe, type, info);
+ }