added generation of gnuplot figures as pseudo-ctest; +bench_all.sh

* test_pffft now produces .csv files directly
* automatic compilation/testing and plots with bench_all.sh

Signed-off-by: hayati ayguen <[email protected]>
diff --git a/pffft.c b/pffft.c
index 36bf6a8..ce76542 100644
--- a/pffft.c
+++ b/pffft.c
@@ -71,6 +71,7 @@
 #endif
 
 #include <stdlib.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <math.h>
 #include <assert.h>