swscale/swscale-test: Check av_image_fill_linesizes() for failure

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libswscale/swscale-test.c

@@ -106,7 +106,11 @@ static int doTest(uint8_t *ref[4], int refStride[4], int w, int h,
         for (p = 0; p < 4; p++)
             av_freep(&src[p]);
 
-        av_image_fill_linesizes(srcStride, srcFormat, srcW);
+        res = av_image_fill_linesizes(srcStride, srcFormat, srcW);
+        if (res < 0) {
+            fprintf(stderr, "av_image_fill_linesizes failed\n");
+            goto end;
+        }
         for (p = 0; p < 4; p++) {
             srcStride[p] = FFALIGN(srcStride[p], 16);
             if (srcStride[p])
@@ -134,7 +138,12 @@ static int doTest(uint8_t *ref[4], int refStride[4], int w, int h,
         cur_srcH      = srcH;
     }
 
-    av_image_fill_linesizes(dstStride, dstFormat, dstW);
+    res = av_image_fill_linesizes(dstStride, dstFormat, dstW);
+    if (res < 0) {
+        fprintf(stderr, "av_image_fill_linesizes failed\n");
+        goto end;
+    }
+
     for (i = 0; i < 4; i++) {
         /* Image buffers passed into libswscale can be allocated any way you
          * prefer, as long as they're aligned enough for the architecture, and