SplashOutputDev::tilingPatternFill: Fix crash on broken file

Issue #802

poppler/SplashOutputDev.cc

@@ -4581,6 +4581,10 @@ bool SplashOutputDev::tilingPatternFill(GfxState *state, Gfx *gfxA, Catalog *cat
     surface_width = (int) ceil (fabs(kx));
     surface_height = (int) ceil (fabs(ky));
     // adjust repeat values to completely fill region
+    if (unlikely(surface_width == 0 || surface_height == 0)) {
+        state->setCTM(savedCTM[0], savedCTM[1], savedCTM[2], savedCTM[3], savedCTM[4], savedCTM[5]);
+        return false;
+    }
     repeatX = result_width / surface_width;
     repeatY = result_height / surface_height;
     if (surface_width * repeatX < result_width)