change code to use allocMem wrapper for memory allocation

One of the new string handling routines is a wrapper for allocating
memory. This commit changes the rest of the code to take advantage of
that wrapper.

queue.c

@@ -22,9 +22,9 @@
  */
 
 #include <assert.h>
-#include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
+
+#include "stringhandling.h"
 
 struct queue_entry_t {
 	void *data;
@@ -38,11 +38,9 @@ struct queue_t {
 
 struct queue_t *new_queue(void)
 {
-	struct queue_t *q = malloc(sizeof(struct queue_t));
-	if (q) {
-		q->head = NULL;
-		q->tail = NULL;
-	}
+	struct queue_t *q = allocMem(sizeof(struct queue_t));
+	q->head = NULL;
+	q->tail = NULL;
 	return q;
 }
 
@@ -51,11 +49,7 @@ int queue_add(struct queue_t *q, void *data)
 	struct queue_entry_t *tmp;
 
 	assert(data);
-	tmp = malloc(sizeof(struct queue_entry_t));
-	if (!tmp) {
-		printf("Unable to allocate memory for queue entry.\n");
-		return 0;
-	}
+	tmp = allocMem(sizeof(struct queue_entry_t));
 	tmp->data = data;
 	tmp->next = NULL;
 	if (!q->tail) {

softsynth.c

@@ -45,11 +45,7 @@ static void queue_add_cmd(enum command_t cmd, enum adjust_t adj, int value)
 	struct espeak_entry_t *entry;
 	int added = 0;
 
-	entry = malloc(sizeof(struct espeak_entry_t));
-	if (!entry) {
-		perror("unable to allocate memory for queue entry");
-		return;
-	}
+	entry = allocMem(sizeof(struct espeak_entry_t));
 	entry->cmd = cmd;
 	entry->adjust = adj;
 	entry->value = value;
@@ -67,11 +63,7 @@ static void queue_add_text(char *txt, size_t length)
 	struct espeak_entry_t *entry;
 	int added = 0;
 
-	entry = malloc(sizeof(struct espeak_entry_t));
-	if (!entry) {
-		perror("unable to allocate memory for queue entry");
-		return;
-	}
+	entry = allocMem(sizeof(struct espeak_entry_t));
 	entry->cmd = CMD_SPEAK_TEXT;
 	entry->adjust = ADJ_SET;
 	entry->buf = strdup(txt);

stringhandling.h

@@ -20,6 +20,8 @@
 #ifndef __STRINGHANDLING_H
 #define __STRINGHANDLING_H
 
+#include <stddef.h>
+
 extern char *EMPTYSTRING;
 
 void *allocMem(size_t n);