Close file when it's not used any longer.
Coverity CID 1295384.

regress/source_hole.c

diff --git a/regress/source_hole.c b/regress/source_hole.c
index c2d7b92..79e9d64 100644
--- a/regress/source_hole.c
+++ b/regress/source_hole.c
@@ -144,6 +144,7 @@
                 buffer_free(buffer);
                 return NULL;
             }
+	    fclose(f);
         }
     }