convert k-vec cython import to relative as per #157

Author: briantoby

GSASII/k_vector_search.py

@@ -41,7 +41,7 @@
     G2fil.NeededPackage({'magnetic k-vector search':['seekpath']})
     gen_option_avail = False
 try:
-    from GSASII.kvec_general. import parallel_proc
+    from GSASII.kvec_general import parallel_proc
 except ModuleNotFoundError:
     gen_option_avail = False