1 files changed, 5 insertions, 2 deletions
diff --git a/src/scan.c b/src/scan.c
index 69c987b..28191e8 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -621,8 +621,8 @@ GetImagePixels(image, width, height, pmap)
     char *dst;
     unsigned int *iptr;
     char *data;
-    unsigned int x, y, i;
-    int bits, depth, ibu, ibpp, offset;
+    unsigned int x, y;
+    int bits, depth, ibu, ibpp, offset, i;
     unsigned long lbt;
     Pixel pixel, px;
 
@@ -633,6 +633,9 @@ GetImagePixels(image, width, height, pmap)
     ibpp = image->bits_per_pixel;
     offset = image->xoffset;
 
+    if (image->bitmap_unit < 0)
+	    return (XpmNoMemory);
+
     if ((image->bits_per_pixel | image->depth) == 1) {
 	ibu = image->bitmap_unit;
 	for (y = 0; y < height; y++)