make relative import more consistent (python3, convension)

svn: r20692

gramps/gen/soundex.py

@@ -41,7 +41,7 @@ IGNORE = "HW~!@#$%^&*()_+=-`[]\|;:'/?.,<>\" \t\f\v"
 TABLE  = string.maketrans('ABCDEFGIJKLMNOPQRSTUVXYZ', 
                           '012301202245501262301202')
 
-from gramps.gen.constfunc import conv_to_unicode_direct
+from .constfunc import conv_to_unicode_direct
 
 #-------------------------------------------------------------------------
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