MINOR: samples: rename a struct from sample_storage to sample_data

This a first step of sample reorganization.
diff --git a/include/types/pattern.h b/include/types/pattern.h
index 54af8fb..86d4bc8 100644
--- a/include/types/pattern.h
+++ b/include/types/pattern.h
@@ -129,7 +129,7 @@
  * "sample" with a tree entry. It is used with maps.
  */
 struct pattern_tree {
-	struct sample_storage *smp;
+	struct sample_data *smp;
 	struct pat_ref_elt *ref;
 	struct ebmb_node node;
 };
@@ -168,7 +168,7 @@
 	} ptr;                          /* indirect values, allocated */
 	int len;                        /* data length when required  */
 	int sflags;                     /* flags relative to the storage method. */
-	struct sample_storage *smp;     /* used to store a pointer to sample value associated
+	struct sample_data *smp;        /* used to store a pointer to sample value associated
 	                                   with the match. It is used with maps */
 	struct pat_ref_elt *ref;
 };
@@ -212,7 +212,7 @@
 /* This struct contain a list of pattern expr */
 struct pattern_head {
 	int (*parse)(const char *text, struct pattern *pattern, int flags, char **err);
-	int (*parse_smp)(const char *text, struct sample_storage *smp);
+	int (*parse_smp)(const char *text, struct sample_data *smp);
 	int (*index)(struct pattern_expr *, struct pattern *, char **);
 	void (*delete)(struct pattern_expr *, struct pat_ref_elt *);
 	void (*prune)(struct pattern_expr *);
diff --git a/include/types/sample.h b/include/types/sample.h
index a7db5c0..f34cf17 100644
--- a/include/types/sample.h
+++ b/include/types/sample.h
@@ -269,7 +269,7 @@
 };
 
 /* Used to store sample constant */
-struct sample_storage {
+struct sample_data {
 	int type;                 /* SMP_T_* */
 	union {
 		long long int   sint;  /* used for signed 64bits integers */
diff --git a/include/types/vars.h b/include/types/vars.h
index c387a77..14cb33d 100644
--- a/include/types/vars.h
+++ b/include/types/vars.h
@@ -27,7 +27,7 @@
 struct var {
 	struct list l; /* Used for chaining vars. */
 	const char *name; /* Contains the variable name. */
-	struct sample_storage data; /* data storage. */
+	struct sample_data data; /* data storage. */
 };
 
 #endif