Prevents editor crash when compare with negative float in shader

servers/rendering/shader_language.cpp

@@ -5252,7 +5252,9 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
 			}
 
 #if DEBUG_ENABLED
-			if (check_warnings && HAS_WARNING(ShaderWarning::FLOAT_COMPARISON_FLAG) && (op == OP_EQUAL || op == OP_NOT_EQUAL) && expression[i - 1].node->get_datatype() == TYPE_FLOAT && expression[i + 1].node->get_datatype() == TYPE_FLOAT) {
+			if (check_warnings && HAS_WARNING(ShaderWarning::FLOAT_COMPARISON_FLAG) && (op == OP_EQUAL || op == OP_NOT_EQUAL) &&
+					(!expression[i - 1].is_op && !expression[i + 1].is_op) &&
+					(expression[i - 1].node->get_datatype() == TYPE_FLOAT && expression[i + 1].node->get_datatype() == TYPE_FLOAT)) {
 				_add_line_warning(ShaderWarning::FLOAT_COMPARISON);
 			}
 #endif // DEBUG_ENABLED