signal: Fix compiler warning about signedness of constant
Use the u suffix to mark the constant as unsiged integer.
This fixes:
warning: this decimal constant is unsigned only in ISO C90
diff --git a/include/osmocom/core/signal.h b/include/osmocom/core/signal.h
index 097aa19..07d0e6f 100644
--- a/include/osmocom/core/signal.h
+++ b/include/osmocom/core/signal.h
@@ -12,7 +12,7 @@
* libraries: from 0 to UINT_MAX/2 for applications, from UINT_MAX/2 to
* UINT_MAX for libraries. */
#define OSMO_SIGNAL_SS_APPS 0
-#define OSMO_SIGNAL_SS_RESERVED 2147483648
+#define OSMO_SIGNAL_SS_RESERVED 2147483648u
/*! \brief signal subsystems */
enum {
@@ -22,7 +22,7 @@
/* application-defined signal types. */
#define OSMO_SIGNAL_T_APPS 0
-#define OSMO_SIGNAL_T_RESERVED 2147483648
+#define OSMO_SIGNAL_T_RESERVED 2147483648u
/*! \brief signal types. */
enum {