gsmmap: fix -Werror=old-style-definition

Change-Id: I44ad2f34b317152616c77f6c1fdb4f06a7b511c5
---
M src/host/gsmmap/gsmmap.c
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/host/gsmmap/gsmmap.c b/src/host/gsmmap/gsmmap.c
index feb8501..33d0638 100644
--- a/src/host/gsmmap/gsmmap.c
+++ b/src/host/gsmmap/gsmmap.c
@@ -52,7 +52,7 @@
 	exit(-ENOMEM);
 }
 
-static void add_power()
+static void add_power(void)
 {
 	struct node_power *node_power;
 
@@ -81,7 +81,7 @@
 		fprintf(outfp, "%s", buffer);
 }
 
-static void add_sysinfo()
+static void add_sysinfo(void)
 {
 	struct gsm48_sysinfo s;
 	struct node_mcc *mcc;

