Enforce input and output dimensionalities for CPDF_StitchFunc.

testing/resources/bug_551460.pdf

Index: testing/resources/bug_551460.pdf
diff --git a/testing/resources/bug_551460.pdf b/testing/resources/bug_551460.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..926e3fad2dc06e198f35a342f45dd1ca50bf5cb4
--- /dev/null
+++ b/testing/resources/bug_551460.pdf
@@ -0,0 +1,89 @@
+%PDF-1.7
+% ò¤ô
+
+1 0 obj
+<<
+  /Pages 2 0 R
+>>
+endobj
+
+2 0 obj
+<<
+  /Kids [ 3 0 R ]
+>>
+endobj
+
+3 0 obj
+<<
+  /Contents 6 0 R
+  /Resources 5 0 R
+>>
+endobj
+
+6 0 obj
+<<>>
+stream
+0.0 G
+0.0 1.0 0.0 rg
+25 175 175 -150 re
+/Sh sh
+endstream
+endobj
+
+5 0 obj
+<<
+  /Shading <<
+    /Sh 7 0 R
+  >>
+>>
+endobj
+
+7 0 obj
+<<
+  /ShadingType 1
+  /ColorSpace /DeviceCMYK
+  /Coords [0.0 0.0 1.0 1.0]
+  /Function 9 0 R
+  /Extend [true true]
+>>
+
+9 0 obj
+<<
+  /FunctionType 3
+  /Domain [0.0 1.0 0.0 1.0]
+  /Functions [10 0 R]
+  /Bounds [2.0]
+  /Encode [0.0 1.0]
+>>
+endobj
+
+10 0 obj
+<<
+  /FunctionType 2
+  /Domain [0.0 1.0 0.0 1.0]
+  /C0 [0.0 0.0]
+  /C1 [1.0 1.0]
+  /N 1
+>>
+endobj
+
+xref
+0 11
+0000000000 65535 f 
+0000000016 00000 n 
+0000000053 00000 n 
+0000000093 00000 n 
+0000000000 65535 f 
+0000000237 00000 n 
+0000000152 00000 n 
+0000000292 00000 n 
+0000000000 65535 f 
+0000000418 00000 n 
+0000000544 00000 n 
+trailer <<
+  /Root 1 0 R
+  /Size 11
+>>
+startxref
+652
+%%EOF