SmartOS build fix

.gitignore

@@ -28,5 +28,6 @@ stamp-h1
 *.pc
 /src/jansson_config.h
 /jansson_private_config.h.in
+/jansson_private_config.h
 /build
 *.exe

src/value.c

@@ -29,8 +29,10 @@
 
 /* Work around nonstandard isnan() and isinf() implementations */
 #ifndef isnan
+#ifndef sun
 static JSON_INLINE int isnan(double x) { return x != x; }
 #endif
+#endif
 #ifndef isinf
 static JSON_INLINE int isinf(double x) { return !isnan(x) && isnan(x - x); }
 #endif