SW_RenderGeometry: add a redundant check to clear static analysis (see bug #4600)

src/render/direct3d/SDL_render_d3d.c

@@ -1036,6 +1036,7 @@ D3D_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture *t
     }
 
     cmd->data.draw.count = count;
+    size_indices = indices ? size_indices : 0;
 
     for (i = 0; i < count; i++) {
         int j;

src/render/direct3d11/SDL_render_d3d11.c

@@ -1881,6 +1881,7 @@ D3D11_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture
     }
 
     cmd->data.draw.count = count;
+    size_indices = indices ? size_indices : 0;
 
     for (i = 0; i < count; i++) {
         int j;

src/render/metal/SDL_render_metal.m

@@ -1333,6 +1333,7 @@ METAL_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture
     }
 
     cmd->data.draw.count = count;
+    size_indices = indices ? size_indices : 0;
 
     for (int i = 0; i < count; i++) {
         int j;

src/render/opengl/SDL_render_gl.c

@@ -1074,6 +1074,7 @@ GL_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture *te
     }
 
     cmd->data.draw.count = count;
+    size_indices = indices ? size_indices : 0;
 
     for (i = 0; i < count; i++) {
         int j;

src/render/opengles/SDL_render_gles.c

@@ -778,6 +778,7 @@ GLES_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture *
     }
 
     cmd->data.draw.count = count;
+    size_indices = indices ? size_indices : 0;
 
     for (i = 0; i < count; i++) {
         int j;

src/render/opengles2/SDL_render_gles2.c

@@ -955,6 +955,7 @@ GLES2_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture
     }
 
     cmd->data.draw.count = count;
+    size_indices = indices ? size_indices : 0;
 
     for (i = 0; i < count; i++) {
         int j;

src/render/software/SDL_render_sw.c

@@ -593,6 +593,7 @@ SW_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SDL_Texture *te
     }
 
     cmd->data.draw.count = count;
+    size_indices = indices ? size_indices : 0;
 
     if (texture) {
         GeometryCopyData *ptr = (GeometryCopyData *) verts;