coverity#12093[81-94], etc. null pointer dereference

coverity seems to think that code execution can continue
after a coverity test fails, but it will effectively halt
and not trundle into the dereference of the tested-for-NULL
pointer, try a [+kill] on the fail method

Change-Id: I07c9a074b5681c367a31637c8af78d52a9c88d59

external/cppunit/UnpackedTarball_cppunit.mk

@@ -12,6 +12,7 @@ $(eval $(call gb_UnpackedTarball_UnpackedTarball,cppunit))
 $(eval $(call gb_UnpackedTarball_set_tarball,cppunit,$(CPPUNIT_TARBALL),,cppunit))
 
 $(eval $(call gb_UnpackedTarball_add_patches,cppunit,\
+	external/cppunit/coverity.patch \
 	external/cppunit/windows.patch \
 	external/cppunit/unix.patch \
 	external/cppunit/wundef.patch \

external/cppunit/coverity.patch

@@ -0,0 +1,11 @@
+--- misc/cppunit-1.13.1/src/cppunit/Asserter.cpp
++++ misc/build/cppunit-1.13.1/src/cppunit/Asserter.cpp
+@@ -13,7 +13,7 @@
+   fail( Message( "assertion failed", message ), sourceLine );
+ }
+ 
+-
++// coverity[+kill]
+ void 
+ Asserter::fail( const Message &message, 
+                 const SourceLine &sourceLine )