A typo in ShaderCompilerGLES2 constructor code '==' used instead of '='

drivers/gles2/shader_compiler_gles2.cpp

@@ -712,7 +712,7 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 
 	actions[VS::SHADER_CANVAS_ITEM].renames["WORLD_MATRIX"] = "modelview_matrix";
 	actions[VS::SHADER_CANVAS_ITEM].renames["PROJECTION_MATRIX"] = "projection_matrix";
-	actions[VS::SHADER_CANVAS_ITEM].renames["EXTRA_MATRIX"] == "extra_matrix";
+	actions[VS::SHADER_CANVAS_ITEM].renames["EXTRA_MATRIX"] = "extra_matrix";
 	actions[VS::SHADER_CANVAS_ITEM].renames["TIME"] = "time";
 	actions[VS::SHADER_CANVAS_ITEM].renames["AT_LIGHT_PASS"] = "at_light_pass";
 	actions[VS::SHADER_CANVAS_ITEM].renames["INSTANCE_CUSTOM"] = "instance_custom";