gdiplus: Add a stub for GdipSetLineTransform.

dlls/gdiplus/brush.c

diff --git a/dlls/gdiplus/brush.c b/dlls/gdiplus/brush.c
index 26b5682..7f324f3 100644
--- a/dlls/gdiplus/brush.c
+++ b/dlls/gdiplus/brush.c
@@ -686,3 +686,14 @@
 
     return NotImplemented;
 }
+
+GpStatus WINGDIPAPI GdipSetLineTransform(GpLineGradient *brush,
+    GDIPCONST GpMatrix *matrix)
+{
+    static int calls;
+
+    if(!(calls++))
+        FIXME("not implemented\n");
+
+    return NotImplemented;
+}

dlls/gdiplus/gdiplus.spec

diff --git a/dlls/gdiplus/gdiplus.spec b/dlls/gdiplus/gdiplus.spec
index 6fc7f0b..c48c18c 100644
--- a/dlls/gdiplus/gdiplus.spec
+++ b/dlls/gdiplus/gdiplus.spec
@@ -541,7 +541,7 @@
 @ stdcall GdipSetLineLinearBlend(ptr long long)
 @ stdcall GdipSetLinePresetBlend(ptr ptr ptr long)
 @ stdcall GdipSetLineSigmaBlend(ptr long long)
-@ stub GdipSetLineTransform
+@ stdcall GdipSetLineTransform(ptr ptr)
 @ stdcall GdipSetLineWrapMode(ptr long)
 @ stdcall GdipSetMatrixElements(ptr long long long long long long)
 @ stub GdipSetMetafileDownLevelRasterizationLimit