updated for version 7.3.621
Problem:    Compiler warnings on 64 bit windows.
Solution:   Add type casts. (Mike Williams)
diff --git a/src/search.c b/src/search.c
index 5ee0e48..aa858f9 100644
--- a/src/search.c
+++ b/src/search.c
@@ -4621,7 +4621,8 @@
 	    {
 		/* searching backwards, so set pos to last line and col */
 		pos.lnum = curwin->w_buffer->b_ml.ml_line_count;
-		pos.col  = STRLEN(ml_get(curwin->w_buffer->b_ml.ml_line_count));
+		pos.col  = (colnr_T)STRLEN(
+				ml_get(curwin->w_buffer->b_ml.ml_line_count));
 	    }
 	}