Fix odr error

---
 gdb/gdbserver/ax.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/gdbserver/ax.c b/gdb/gdbserver/ax.c
index 213db410a0..42d28128fa 100644
--- a/gdb/gdbserver/ax.c
+++ b/gdb/gdbserver/ax.c
@@ -25,7 +25,7 @@
 static void ax_vdebug (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
 
 #ifdef IN_PROCESS_AGENT
-int debug_agent = 0;
+bool debug_agent = 0;
 #endif
 
 static void