fix(solutions): memory issues thanks to -fsanitize=address flag with gcc

challenges/look-and-say-sequence-conway/solutions/c/function/character.c

@@ -1,8 +1,5 @@
 #include "character.h"
 
-#include <stdlib.h>
-#include <string.h>
-
 void character_append(char* string, char character) {
   size_t length = strlen(string);
   string[length] = character;

challenges/look-and-say-sequence-conway/solutions/c/function/character.h

@@ -1,6 +1,9 @@
 #ifndef __CHARACTER__
 #define __CHARACTER__
 
+#include <stdlib.h>
+#include <string.h>
+
 /**
  * @brief Append a character to a string, assuming string points to an array
  * with enough space.

challenges/look-and-say-sequence-conway/solutions/c/function/input.c

@@ -1,10 +1,5 @@
 #include "input.h"
 
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "character.h"
-
 char* input() {
   char character;
   size_t length = 1;

challenges/look-and-say-sequence-conway/solutions/c/function/input.h

@@ -1,6 +1,11 @@
 #ifndef __INPUT__
 #define __INPUT__
 
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "character.h"
+
 /**
  * @brief Read a line from stdin.
  *

challenges/look-and-say-sequence-conway/solutions/c/function/solution.c

@@ -24,5 +24,7 @@ int main() {
     index += number_of_appearances - 1;
   }
   printf("%s\n", result);
+  free(string);
+  free(result);
   return EXIT_SUCCESS;
 }