Fix rlSetUniformSampler (#3759)

Fix rlSetUniformSampler not setting sampler uniform if the same texture was already passed to a different sampler uniform

Author: veins1

src/rlgl.h

@@ -4135,7 +4135,14 @@ void rlSetUniformSampler(int locIndex, unsigned int textureId)
 {
 #if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
     // Check if texture is already active
-    for (int i = 0; i < RL_DEFAULT_BATCH_MAX_TEXTURE_UNITS; i++) if (RLGL.State.activeTextureId[i] == textureId) return;
+    for (int i = 0; i < RL_DEFAULT_BATCH_MAX_TEXTURE_UNITS; i++)
+    {
+        if (RLGL.State.activeTextureId[i] == textureId)
+        {
+            glUniform1i(locIndex, 1 + i);
+            return;
+        }
+    }
 
     // Register a new active texture for the internal batch system
     // NOTE: Default texture is always activated as GL_TEXTURE0