Coalesce all tutorials requiring UMPACK under single conditional.

tutorials/Makefile.am

@@ -6,20 +6,16 @@ LDFLAGS = $(BOOST_LDFLAGS)
 
 LDADD =	$(top_builddir)/libopmcore.la
 
-noinst_PROGRAMS = tutorial1
-tutorial1_SOURCES   = tutorial1.cpp
+noinst_PROGRAMS   = tutorial1
+tutorial1_SOURCES = tutorial1.cpp
 
 if UMFPACK
-noinst_PROGRAMS   += tutorial2
-tutorial2_SOURCES  = tutorial2.cpp
-endif
+noinst_PROGRAMS +=				\
+tutorial2					\
+tutorial3					\
+tutorial4
 
-if UMFPACK
-noinst_PROGRAMS   += tutorial3
-tutorial3_SOURCES  = tutorial3.cpp
-endif
-
-if UMFPACK
-noinst_PROGRAMS += tutorial4
+tutorial2_SOURCES = tutorial2.cpp
+tutorial3_SOURCES = tutorial3.cpp
 tutorial4_SOURCES = tutorial4.cpp
 endif