fix PETSc build without MPI on version 1.7.2

Thanks to Douglas for pointing out this solution

fix PETSc build without MPI on version 1.7.2
Thanks to Douglas for pointing out this solution
f44e8c6f · Kilian Lackhove · b6ce28d5 · f44e8c6f
Commit f44e8c6f authored Jul 07, 2016 by Kilian Lackhove
--- a/cmake/ThirdPartyPETSc.cmake
+++ b/cmake/ThirdPartyPETSc.cmake
@@ -92,7 +92,7 @@ IF (NEKTAR_USE_PETSC)
    ADD_DEFINITIONS(-DNEKTAR_USING_PETSC)
    INCLUDE_DIRECTORIES(SYSTEM ${PETSC_INCLUDES})
    IF (NOT NEKTAR_USE_MPI)
-        INCLUDE_DIRECTORIES(SYSTEM ${PETSC_INCLUDES}/mpiuni)
+        INCLUDE_DIRECTORIES(SYSTEM ${PETSC_INCLUDES}/petsc/mpiuni)
    ENDIF (NOT NEKTAR_USE_MPI)

    MARK_AS_ADVANCED(PETSC_CURRENT PETSC_DIR PETSC_LIBRARIES PETSC_INCLUDES)