Cleanup: IO, Clang-Tidy else-after-return fixes

This addresses warnings from Clang-Tidy's `readability-else-after-return`
rule in the `source/blender/io` module.

No functional changes.

2 files changed, 26 insertions, 29 deletions

diff --git a/source/blender/io/avi/intern/avi.c b/source/blender/io/avi/intern/avi.c
index e829a15deba..0ab51b7a084 100644
--- a/source/blender/io/avi/intern/avi.c
+++ b/source/blender/io/avi/intern/avi.c
@@ -116,9 +116,8 @@ int AVI_get_stream(AviMovie *movie, int avist_type, int stream_num)
       if (stream_num == 0) {
         return cur_stream;
       }
-      else {
-        stream_num--;
-      }
+
+      stream_num--;
     }
   }
 
@@ -572,9 +571,8 @@ AviError AVI_open_movie(const char *name, AviMovie *movie)
       if (GET_FCC(movie->fp) == FCC("movi")) {
         break;
       }
-      else {
-        BLI_fseek(movie->fp, size - 4, SEEK_CUR);
-      }
+
+      BLI_fseek(movie->fp, size - 4, SEEK_CUR);
     }
     else {
       BLI_fseek(movie->fp, size, SEEK_CUR);
diff --git a/source/blender/io/avi/intern/avi_rgb.c b/source/blender/io/avi/intern/avi_rgb.c
index 44542af96ae..8af728f0737 100644
--- a/source/blender/io/avi/intern/avi_rgb.c
+++ b/source/blender/io/avi/intern/avi_rgb.c
@@ -96,35 +96,34 @@ void *avi_converter_from_avi_rgb(AviMovie *movie,
 
     return buf;
   }
-  else {
-    buf = imb_alloc_pixels(
-        movie->header->Height, movie->header->Width, 3, sizeof(unsigned char), "fromavirgbbuf");
-
-    if (buf) {
-      size_t rowstride = movie->header->Width * 3;
-      BLI_assert(bits != 16);
-      if (movie->header->Width % 2) {
-        rowstride++;
-      }
 
-      for (size_t y = 0; y < movie->header->Height; y++) {
-        memcpy(&buf[y * movie->header->Width * 3],
-               &buffer[((movie->header->Height - 1) - y) * rowstride],
-               movie->header->Width * 3);
-      }
+  buf = imb_alloc_pixels(
+      movie->header->Height, movie->header->Width, 3, sizeof(unsigned char), "fromavirgbbuf");
 
-      for (size_t y = 0; y < (size_t)movie->header->Height * (size_t)movie->header->Width * 3;
-           y += 3) {
-        int i = buf[y];
-        buf[y] = buf[y + 2];
-        buf[y + 2] = i;
-      }
+  if (buf) {
+    size_t rowstride = movie->header->Width * 3;
+    BLI_assert(bits != 16);
+    if (movie->header->Width % 2) {
+      rowstride++;
     }
 
-    MEM_freeN(buffer);
+    for (size_t y = 0; y < movie->header->Height; y++) {
+      memcpy(&buf[y * movie->header->Width * 3],
+             &buffer[((movie->header->Height - 1) - y) * rowstride],
+             movie->header->Width * 3);
+    }
 
-    return buf;
+    for (size_t y = 0; y < (size_t)movie->header->Height * (size_t)movie->header->Width * 3;
+         y += 3) {
+      int i = buf[y];
+      buf[y] = buf[y + 2];
+      buf[y + 2] = i;
+    }
   }
+
+  MEM_freeN(buffer);
+
+  return buf;
 }
 
 void *avi_converter_to_avi_rgb(AviMovie *movie, int stream, unsigned char *buffer, size_t *size)