Fix interface declaration for C function free() in the F2003 interface.

interfaces/f2003/bindGen.rb

@@ -605,7 +605,7 @@ $verbatimDeclarations = '
 
 		subroutine lib_free(pointer) bind(c, name = "free")
 			import c_ptr
-			type(c_ptr), value :: pointer
+			type(c_ptr), value, intent(in) :: pointer
 		end subroutine lib_free
 	end interface
 '

src/mo_cdi.f90

 ! >>> Warning: This is a generated file. If you modify it, you get what you deserve. <<<
 !
-! Generated by "../../../interfaces/f2003/bindGen.rb" from input file "../../../src/cdi.h".
+! Generated by "../interfaces/f2003/bindGen.rb" from input file "../src/cdi.h".
 
 module mo_cdi
   use iso_c_binding
@@ -18,7 +18,7 @@ module mo_cdi
 
     subroutine lib_free(pointer) bind(c, name = "free")
       import c_ptr
-      type(c_ptr), value :: pointer
+      type(c_ptr), value, intent(in) :: pointer
     end subroutine lib_free
   end interface