glib: Fix some misuses of gsize/size_t types

This unbreaks cross compile builds:

configure --target-list="i386-softmmu" --cpu=i386

When building on a 64bit machine.
Reported-by: NDavid Holsgrove <david.holsgrove@xilinx.com>
Signed-off-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
Message-id: 926326e96fd8685d74e9d5bf430fe4ad97a55289.1369191585.git.peter.crosthwaite@xilinx.com
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/nvram/fw_cfg.c

@@ -54,7 +54,7 @@ struct FWCfgState {
 #define JPG_FILE 0
 #define BMP_FILE 1
 
-static char *read_splashfile(char *filename, size_t *file_sizep,
+static char *read_splashfile(char *filename, gsize *file_sizep,
                              int *file_typep)
 {
     GError *err = NULL;
@@ -112,7 +112,7 @@ static void fw_cfg_bootsplash(FWCfgState *s)
     const char *boot_splash_filename = NULL;
     char *p;
     char *filename, *file_data;
-    size_t file_size;
+    gsize file_size;
     int file_type;
     const char *temp;
 

qemu-char.c

@@ -2920,7 +2920,7 @@ void qmp_ringbuf_write(const char *device, const char *data,
     CharDriverState *chr;
     const uint8_t *write_data;
     int ret;
-    size_t write_count;
+    gsize write_count;
 
     chr = qemu_chr_find(device);
     if (!chr) {