SDL: opengles2: Batching lines/points used wrong var for summing vertex counts.

SDL Commits
1 
From c275436f565b28d7a301395c0d45c7f1085b5f18 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sun, 9 Jan 2022 00:39:02 -0500
Subject: [PATCH] opengles2: Batching lines/points used wrong var for summing
 vertex counts.

Fixed this in the vitagxm backend too, but I don't know what the state of
that code is otherwise.

Reference Issue #5061.
---
 src/render/opengles2/SDL_render_gles2.c  | 4 ++--
 src/render/vitagxm/SDL_render_vita_gxm.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c
index 3011c2e12d3..c38ee972323 100644
--- a/src/render/opengles2/SDL_render_gles2.c
+++ b/src/render/opengles2/SDL_render_gles2.c
@@ -1205,7 +1205,7 @@ GLES2_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *ver
                                 break;  /* can't go any further on this draw call, different blendmode copy up next. */
                             } else {
                                 finalcmd = nextcmd;  /* we can combine copy operations here. Mark this one as the furthest okay command. */
-                                count += cmd->data.draw.count;
+                                count += nextcmd->data.draw.count;
                             }
                             nextcmd = nextcmd->next;
                         }
@@ -1236,7 +1236,7 @@ GLES2_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *ver
                         break;  /* can't go any further on this draw call, different texture/blendmode copy up next. */
                     } else {
                         finalcmd = nextcmd;  /* we can combine copy operations here. Mark this one as the furthest okay command. */
-                        count += cmd->data.draw.count;
+                        count += nextcmd->data.draw.count;
                     }
                     nextcmd = nextcmd->next;
                 }
diff --git a/src/render/vitagxm/SDL_render_vita_gxm.c b/src/render/vitagxm/SDL_render_vita_gxm.c
index 761abe7c504..937701298ad 100644
--- a/src/render/vitagxm/SDL_render_vita_gxm.c
+++ b/src/render/vitagxm/SDL_render_vita_gxm.c
@@ -817,7 +817,7 @@ VITA_GXM_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *
                         break;  /* can't go any further on this draw call, different texture/blendmode copy up next. */
                     } else {
                         finalcmd = nextcmd;  /* we can combine copy operations here. Mark this one as the furthest okay command. */
-                        count += cmd->data.draw.count;
+                        count += nextcmd->data.draw.count;
                     }
                     nextcmd = nextcmd->next;
                 }