Set types for non-metis builds

In case we are not building with the metis library, we still need to set
`metis_*_kind` since those types are used even without the metis
library. It would be helpful to clean that up a bit better and
completely separate the metis type issue from the rest of the code that
doesn't use metis.

Fixes: #43

CMakeLists.txt

@@ -183,6 +183,9 @@ if(PROGRESS_GRAPHLIB)
   else()
     add_definitions(-DMETIS_REAL_KIND=0d0)
   endif()
+else()
+    add_definitions(-DMETIS_INDEX_KIND=4)
+    add_definitions(-DMETIS_REAL_KIND=0d0)
 endif()
 
 set(PROGRESS_OPENMP TRUE CACHE BOOL "Whether to compile with OpenMP support")