Stick pollard.c into libquestions.a.

And don't break builds.

src/questions/Makefile.am

@@ -1,4 +1,4 @@
 
 lib_LIBRARIES = libquestions.a
-libquestions_a_SOURCES = wiener.c example.c allquestions.c
+libquestions_a_SOURCES = wiener.c pollard.c example.c allquestions.c
 # da fuck liquestions_a_HEADERS = qwiener.h questions.h