Update background loading code to behave better when no jpg exists

src/bkg.c

@@ -13,7 +13,7 @@ static pvr_ptr_t bkgtexture = NULL;
 static float horizon = 340.0f;
 int draw_mode = 0;
 int cleared = 0;
-kos_img_t *img;
+kos_img_t *img = NULL;
 
 void bkg_clear()
 {
@@ -52,46 +52,48 @@ uint16 *image, *texture;
 }	 
 /* Make a nice (now familiar =) XOR pattern texture */
 void bkg_setup() {
-	int x, y;
-	uint16 *texture;
-	file_t infile;
-	int file_there = 1;
-	uint16 *image;
-       
-       file_there = 1;
-       
-       if ((infile = fs_open("/cd/vcdc.jpg", O_RDONLY)) == 0) {
-	   file_there = 0;
-       }
-       fs_close (infile);
-       if (file_there)
-       {
-         img = (kos_img_t *)(malloc(sizeof(kos_img_t)));
-         bkgtexture = pvr_mem_malloc(1024*512*2);
-	 draw_mode = 1;
-	 
-         jpeg_to_img("/cd/vcdc.jpg",1, img);
-	 
-	 image = (uint16 *)img->data;
-	 texture = (uint16 *)bkgtexture;
-	 for (y=0; y<480; y++)
-	 {
-	     for (x=0; x<640; x++)
-	       texture[x] = image[x];
-	     texture += 1024; image +=640;  
-	 }
-	 
-       }  
-	
-/* 	chktexture = pvr_mem_malloc(64*64*2);
-	texture = (uint16*)chktexture;
-	for (y=0; y<64; y++)
-		for (x=0; x<64; x++) {
-			int v = ((x*4)^(y*4)) & 255;
-			*texture++ = ((v >> 3) << 11)
-				| ((v >> 2) << 5)
-				| ((v >> 3) << 0); 
-		}  */ 
+    int x, y;
+    uint16 *texture;
+    file_t infile;
+    int file_there = 1;
+    uint16 *image;
+
+    file_there = 1;
+
+    if ((infile = fs_open("/cd/vcdc.jpg", O_RDONLY)) == 0) {
+        file_there = 0;
+    }
+    fs_close (infile);
+    if (file_there) {
+        if(!img)
+            img = (kos_img_t *)(calloc(1, sizeof(kos_img_t)));
+
+        if(jpeg_to_img("/cd/vcdc.jpg",1, img) != 0)
+            return;
+
+        bkgtexture = pvr_mem_malloc(1024*512*2);
+        draw_mode = 1;
+
+        image = (uint16 *)img->data;
+        texture = (uint16 *)bkgtexture;
+        for (y=0; y<480; y++)
+        {
+            for (x=0; x<640; x++)
+                texture[x] = image[x];
+            texture += 1024; image +=640;
+        }
+
+    }
+
+    /* 	chktexture = pvr_mem_malloc(64*64*2);
+    texture = (uint16*)chktexture;
+    for (y=0; y<64; y++)
+    for (x=0; x<64; x++) {
+    int v = ((x*4)^(y*4)) & 255;
+    *texture++ = ((v >> 3) << 11)
+    | ((v >> 2) << 5)
+    | ((v >> 3) << 0);
+    }  */
 }
 
 /* Draws the floor polygon */