C: Added a trick to suppress compilation warnings about an unused

function actually called in a macro

src/obitypes.h

@@ -29,6 +29,7 @@
 #define OBIQual_int_NA (NULL)		/**< NA value for the type OBI_QUAL if the quality is in integer format */
 #define OBITuple_NA (NULL)			/**< NA value for tuples of any type */
 
+
 /**
  * @brief enum for the boolean OBIType.
  */
@@ -93,6 +94,16 @@ static double float_NA(void)
 }
 
 
+/**
+ * @brief Trick to suppress compilation warnings about unused
+ *        float_NA function actually called in macro.
+ */
+static inline void suppress_warning(void) {
+	(void)float_NA;
+	(void)suppress_warning;
+}
+
+
 /**
  * @brief Returns the memory size in bytes of an OBIType.
  *