Polish DEF_* macros

src/tbl_types.h

@@ -7,9 +7,8 @@
 #define DEFDOC_ACL
 VCC_TYPE(ACL, acl)
 
-#define DEF_BACKEND =0
+#define DEF_BACKEND = NULL
 #define DEFDOC_BACKEND DEFDOC no backend.
-#define DEF_BACKEND =0
 VCC_TYPE(BACKEND, backend)
 
 #define DEF_BLOB
@@ -28,7 +27,7 @@ VCC_TYPE(BOOL, bool)
 #define DEFDOC_BYTES
 VCC_TYPE(BYTES, bytes)
 
-#define DEF_DURATION =0
+#define DEF_DURATION = 0
 #define DEFDOC_DURATION DEFDOC 0s.
 VCC_TYPE(DURATION, duration)
 
@@ -41,7 +40,7 @@ VCC_TYPE(HEADER, header)
 // VCC_TYPE(HTTP, http)
 // VCC_TYPE(INSTANCE, instance)
 
-#define DEF_INT =0
+#define DEF_INT = 0
 #define DEFDOC_INT DEFDOC 0.
 VCC_TYPE(INT, int)
 
@@ -53,7 +52,7 @@ VCC_TYPE(IP, ip)
 #define DEFDOC_PROBE
 VCC_TYPE(PROBE, probe)
 
-#define DEF_REAL =0.0
+#define DEF_REAL = 0.0
 #define DEFDOC_REAL DEFDOC 0.0.
 VCC_TYPE(REAL, real)
 
@@ -63,7 +62,7 @@ VCC_TYPE(STEVEDORE, stevedore)
 
 // VCC_TYPE(STRANDS)
 
-#define DEF_STRING =0
+#define DEF_STRING = 0
 #define DEFDOC_STRING DEFDOC the empty string.
 VCC_TYPE(STRING, string)
 
@@ -71,7 +70,7 @@ VCC_TYPE(STRING, string)
 // VCC_TYPE(STRING_LIST)
 // VCC_TYPE(SUB)
 
-#define DEF_TIME =0
+#define DEF_TIME = 0
 #define DEFDOC_TIME DEFDOC the epoch (1970/1/1 0:00:00 GMT).
 VCC_TYPE(TIME, time)