fix comparison of identicals

Some of these check that dimensions match before running code that
assumes they do match.

For imb_stereo3d_write_anaglyph I *assume* this change reflects the
intended behavior. Before it was always grabbing alpha from buffer 0.

Found with PVS-Studio T48917

2 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/imbuf/intern/filter.c b/source/blender/imbuf/intern/filter.c
index 26ced49a333..1987c6d2a9a 100644
--- a/source/blender/imbuf/intern/filter.c
+++ b/source/blender/imbuf/intern/filter.c
@@ -206,7 +206,7 @@ void imb_filterx(struct ImBuf *ibuf)
 static void imb_filterN(ImBuf *out, ImBuf *in)
 {
 	BLI_assert(out->channels == in->channels);
-	BLI_assert(out->x == in->x && out->y == out->y);
+	BLI_assert(out->x == in->x && out->y == in->y);
 
 	const int channels = in->channels;
 	const int rowlen = in->x;
diff --git a/source/blender/imbuf/intern/stereoimbuf.c b/source/blender/imbuf/intern/stereoimbuf.c
index a55cef60943..a4418443790 100644
--- a/source/blender/imbuf/intern/stereoimbuf.c
+++ b/source/blender/imbuf/intern/stereoimbuf.c
@@ -117,7 +117,7 @@ static void imb_stereo3d_write_anaglyph(Stereo3DData *s3d, enum eStereo3dAnaglyp
 					to[0] = from[r][0];
 					to[1] = from[g][1];
 					to[2] = from[b][2];
-					to[3] = MAX2(from[0][3], from[0][3]);
+					to[3] = MAX2(from[0][3], from[1][3]);
 				}
 			}
 		}
@@ -154,7 +154,7 @@ static void imb_stereo3d_write_anaglyph(Stereo3DData *s3d, enum eStereo3dAnaglyp
 					to[0] = from[r][0];
 					to[1] = from[g][1];
 					to[2] = from[b][2];
-					to[3] = MAX2(from[0][3], from[0][3]);
+					to[3] = MAX2(from[0][3], from[1][3]);
 				}
 			}
 		}