Add image_free to tidy-up

image.cc

@@ -106,7 +106,7 @@ int image_init(PIMAGE_CTX ctx, \
 	return success;
 }
 /*
- * image_add_pixel, image_set_pixel, image_get_pixel, image_write
+ * image_add_pixel, image_set_pixel, image_get_pixel, image_write, image_free
  * Various setters ad getters for assigning pixel data. image_write
  * takes an open file handle and writes image data to it.
  * These functions simply wrap the underlying format-specific functions
@@ -134,6 +134,10 @@ int image_write(PIMAGE_CTX ctx, FILE *fd){
 	if(ctx->initialized != 1) return EINVAL;
 	return dt->write(ctx,fd);
 }
+void image_free(PIMAGE_CTX ctx){
+	if(ctx->initialized != 1) return;
+	free(ctx->canvas);
+}
 
 /*
  * image_get_filename

image.hh

@@ -36,6 +36,7 @@ int image_set_pixel(PIMAGE_CTX ctx, const size_t, const size_t, const uint8_t, c
 int image_get_pixel(PIMAGE_CTX ctx,const size_t,const size_t, uint8_t const*, uint8_t const*, uint8_t const*, uint8_t const*);
 int image_get_filename(PIMAGE_CTX, char*, size_t, char*);
 int image_write(PIMAGE_CTX, FILE*);
+void image_free(PIMAGE_CTX);
 int image_set_library(char*);
 
 #define ADD_PIXEL(ctx,r,g,b) image_add_pixel((ctx),(r),(g),(b),0xff)

outputs.cc

@@ -749,6 +749,8 @@ void DoRxdPwr(char *filename, unsigned char geo, unsigned char kml,
 
 	fflush(fd);
 
+	image_free(&ctx);
+
 	if( filename != NULL ) {
 		fclose(fd);
 		fd = NULL;