gdiplus: Fix its vs it's typos.

dlls/gdiplus/region.c

@@ -821,7 +821,7 @@ static void write_element(const region_element* element, DWORD *buffer,
  *  their code followed by a second header for the path followed by the actual
  *  path data. Followed by the flags for each point. The pathheader contains
  *  the size of the data to follow, a version number again, followed by a count
- *  of how many points, and any special flags which may apply. 0x4000 means its
+ *  of how many points, and any special flags which may apply. 0x4000 means it's
  *  a path of shorts instead of FLOAT.
  *
  *  Combining Ops are stored in reverse order from when they were constructed;

dlls/gdiplus/tests/font.c

@@ -74,7 +74,7 @@ static void test_createfont(void)
     stat = GdipDeleteFontFamily(fontfamily2);
     expect(Ok, stat);
 
-    /* Test to see if returned size is based on unit (its not) */
+    /* Test to see if returned size is based on unit (it's not) */
     GdipGetFontSize(font, &size);
     ok (size == 12, "Expected 12, got %f\n", size);
     GdipDeleteFont(font);