tools_common.h: fix get_vpx_encoder_count() proto
silences a missing-prototype warning
Change-Id: Icf5c7f1f3e8ae9792276068fb3c0fd04b40fc7ad
diff --git a/tools_common.h b/tools_common.h
index b92980a..db6e268 100644
--- a/tools_common.h
+++ b/tools_common.h
@@ -131,7 +131,7 @@
vpx_codec_iface_t *(*const codec_interface)();
} VpxInterface;
-int get_vpx_encoder_count();
+int get_vpx_encoder_count(void);
const VpxInterface *get_vpx_encoder_by_index(int i);
const VpxInterface *get_vpx_encoder_by_name(const char *name);