Include used header files

Make source files more self-contained by including the header files they use
(and remove some they don't).
This work was aided by the include_what_you_use tool.

src/dump.c

@@ -19,7 +19,9 @@
 #include <unistd.h>
 #endif
 
+#include "hashtable.h"
 #include "jansson.h"
+#include "jansson_config.h"
 #include "strbuffer.h"
 #include "utf.h"
 

src/error.c

@@ -1,4 +1,7 @@
+#include "jansson.h"
 #include "jansson_private.h"
+#include <stdarg.h>
+#include <stdio.h>
 #include <string.h>
 
 void jsonp_error_init(json_error_t *error, const char *source) {

src/hashtable_seed.c

@@ -42,8 +42,6 @@
 #include <windows.h>
 #endif
 
-#include "jansson.h"
-
 static uint32_t buf_to_uint32(char *data) {
     size_t i;
     uint32_t result = 0;

src/load.c

@@ -9,13 +9,13 @@
 #define _GNU_SOURCE
 #endif
 
+#include "jansson_config.h"
 #include "jansson_private.h"
 
 #include <assert.h>
 #include <errno.h>
-#include <limits.h>
+#include <stdarg.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>

src/pack_unpack.c

@@ -7,8 +7,12 @@
  */
 
 #include "jansson.h"
+#include "jansson_config.h"
 #include "jansson_private.h"
+#include "hashtable.h"
+#include "strbuffer.h"
 #include "utf.h"
+#include <stdarg.h>
 #include <string.h>
 
 typedef struct {

src/strbuffer.c

@@ -11,6 +11,7 @@
 
 #include "strbuffer.h"
 #include "jansson_private.h"
+#include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 

src/strconv.c

@@ -1,9 +1,11 @@
+#include "jansson_config.h"
 #include "jansson_private.h"
 #include "strbuffer.h"
 #include <assert.h>
 #include <errno.h>
 #include <math.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 /* need jansson_private_config.h to get the correct snprintf */

src/utf.c

@@ -6,7 +6,6 @@
  */
 
 #include "utf.h"
-#include <string.h>
 
 int utf8_encode(int32_t codepoint, char *buffer, size_t *size) {
     if (codepoint < 0)

src/value.c

@@ -14,7 +14,9 @@
 #endif
 
 #include <math.h>
+#include <stdarg.h>
 #include <stddef.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -24,6 +26,7 @@
 
 #include "hashtable.h"
 #include "jansson.h"
+#include "jansson_config.h"
 #include "jansson_private.h"
 #include "utf.h"