lib/: Use multi-line macro definitions

This reduces the complexity of those nested parentheses.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

lib/alloc/calloc.h

@@ -11,7 +11,10 @@
 #include <stdlib.h>
 
 
-#define CALLOC(n, type)   ((type *) calloc(n, sizeof(type)))
+#define CALLOC(n, type)                                                       \
+(                                                                             \
+	(type *) calloc(n, sizeof(type))                                      \
+)
 
 
 #endif  // include guard

lib/alloc/malloc.h

@@ -13,7 +13,10 @@
 #include "attr.h"
 
 
-#define MALLOC(n, type)   ((type *) mallocarray(n, sizeof(type)))
+#define MALLOC(n, type)                                                       \
+(                                                                             \
+	(type *) mallocarray(n, sizeof(type))                                 \
+)
 
 
 ATTR_MALLOC(free)

lib/alloc/x/xcalloc.h

@@ -14,7 +14,10 @@
 #include "attr.h"
 
 
-#define XCALLOC(n, type)  ((type *) xcalloc(n, sizeof(type)))
+#define XCALLOC(n, type)                                                      \
+(                                                                             \
+	(type *) xcalloc(n, sizeof(type))                                     \
+)
 
 
 ATTR_MALLOC(free)

lib/alloc/x/xmalloc.h

@@ -14,7 +14,10 @@
 #include "attr.h"
 
 
-#define XMALLOC(n, type)  ((type *) xmallocarray(n, sizeof(type)))
+#define XMALLOC(n, type)                                                      \
+(                                                                             \
+	(type *) xmallocarray(n, sizeof(type))                                \
+)
 
 
 ATTR_MALLOC(free)