fix(python): python ImageBuf.init_spec did not return correct value (AcademySoftwareFoundation#4805)

Signed-off-by: Larry Gritz <lg@larrygritz.com>

Author: lgritz

src/python/py_imagebuf.cpp

@@ -340,7 +340,7 @@ declare_imagebuf(py::module& m)
             [](ImageBuf& self, std::string filename, int subimage,
                int miplevel) {
                 py::gil_scoped_release gil;
-                self.init_spec(filename, subimage, miplevel);
+                return self.init_spec(filename, subimage, miplevel);
             },
             "filename"_a, "subimage"_a = 0, "miplevel"_a = 0)
         .def(

src/python/stubs/OpenImageIO/__init__.pyi

@@ -320,7 +320,7 @@ class ImageBuf:
     def getchannel(self, x: int, y: int, z: int, c: int, wrap=...) -> float: ...
     def geterror(self, clear: bool = ...) -> str: ...
     def getpixel(self, x: int, y: int, z: int = ..., wrap: str = ...) -> tuple[float, ...]: ...
-    def init_spec(self, filename: str, subimage: int = ..., miplevel: int = ...) -> None: ...
+    def init_spec(self, filename: str, subimage: int = ..., miplevel: int = ...) -> bool: ...
     def interppixel(self, x: float, y: float, wrap: str = ...) -> tuple[float, ...]: ...
     def interppixel_NDC(self, x: float, y: float, wrap: str = ...) -> tuple[float, ...]: ...
     def interppixel_NDC_full(self, x: float, y: float, wrap: str = ...) -> tuple[float, ...]: ...